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					          GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 1




For teaching from 2011




GCSE in ADDITIONAL APPLIED
SCIENCE



SPECIMEN ASSESSMENT MATERIALS
             GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 3




Contents



                                                                 Page

 Unit 1

 Question Papers

   Foundation Tier                                                 5

   Higher Tier                                                   25

 Mark Schemes

   Foundation Tier                                               42

   Higher Tier                                                   46

 Assessment Grids                                                53

 Unit 2

 Controlled Assessment: Tasks and Mark Schemes                   57
                   GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 5


           Candidate Name                      Centre Number            Candidate Number
                                                                       0

                       GCSE

                       ADDITIONAL APPLIED SCIENCE

                       FOUNDATION TIER (Grades G-C)

                       UNIT 1: SCIENCE AT WORK

                       SPECIMEN PAPER

                       1 hour

                                                           For Examiner’s use only
                                                                 Maximum             Mark
                                                  Question
                                                                   Mark             Awarded
                                                      1.              3
                                                      2.              3
                                                      3.              3
                                                      4.              4
                                                      5.              4
                                                      6.              4
                                                      7.              3
                                                      8.             11
                                                      9.              4
                                                     10.              9
                                                     11.              4
                                                     12.              8
                                                    Total            60

ADDITIONAL MATERIALS
   In addition to this examination paper, you may require a calculator and ruler.
INSTRUCTIONS TO CANDIDATES
  Write your name, centre number and candidate number in the spaces at the top of this
  page.
  Answer all questions.
  Write your answers in the spaces provided in this booklet.

INFORMATION FOR CANDIDATES
  The number of marks is given in brackets at the end of each question or part-question.
  You are reminded that assessment will take into account the quality of written
  communication used in your answer to question 8(b).
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 6


1.    Physiotherapists need to learn about how muscles work. The diagram shows the
      muscles in the upper arm of a gymnast.




      The table gives some information about the pair of muscles. Only some of the
      statements are true.
      Complete the table by ticking ( ) the box true or false next to each statement.   [3]



                                                                 Tick ( )   Tick ( )
      Statement
                                                                  if true   if false

      Both muscles relax at the same time

      The muscles are called an antagonistic pair


      When the biceps is contracted the triceps is relaxed
                  GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 7


2.   Environmental Health Officers give advice to a chef in a restaurant to prevent
     outbreaks of food poisoning. Food poisoning is caused by bacteria.

     (i)    Give one symptom of food poisoning.                                       [1]

            …………………………………………………………….......................................

     (ii)   Suggest two ways the chef could keep food free from bacteria when it is
            being prepared.                                                           [2]

            1.     ……………………………………………………………………………….

            2.     ……………………………………………………………………………….
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 8


3.      A commercial grower wants to improve the growth of his tomato crop. He uses data
        on the rate of photosynthesis to plan the best conditions for growing the crop.

        (a)                                                 Complete the word equation for photosynthesis:                                   [1]

        carbon dioxide + ……………………                                                                                      glucose + oxygen


        (b)                                                 A graph of photosynthesis against light intensity is shown below.

                                                       15
                                                       14
                                                                                                                    20 oC
                                                       13
            Rate of photosynthesis (arbitrary units)




                                                       12
                                                       11
                                                       10
                                                       9
                                                       8
                                                       7
                                                       6
                                                       5
                                                       4
                                                       3
                                                       2
                                                       1
                                                       0
                                                            0               500      1000        1500         2000          2500
                                                                                   Light Intensity (cd)



                                                            (i)       Circle the lowest value of the light intensity below that gives the
                                                                      maximum rate of photosynthesis at 20 oC.                               [1]


     0 cd                                                          500 cd         1000 cd                 1500 cd                  2000 cd



                                                            (ii)      How will the graph change if a temperature of 25 oC was used instead
                                                                      of 20 oC?                                                         [1]

                                                                ……………………………………………………..………………………………..

                                                                ……………………………………………………….……………………………...
                   GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 9


4.   Tom attends a ‘Well Man Clinic’ run at his local hospital. One of the measurements
     taken to assess his wellbeing is his BMI. Tom is a weight lifter and trains at the local
     gym every day.

     The nurse collects information on his Body Mass Index (BMI).
     BMI is found using the equation:

                     mass (kg)
             BMI =
                     height (m) 2

     (i)    Calculate the BMI for Tom who has a mass of 90 kg and a height of 1.5 m.
                                                                                           [1]




                                                                      BMI = …………………


     (ii)   Use the information below to identify the body type for Tom and explain why
            the BMI index may not be a reliable measure to use in the case of Tom.    [3]

                      A BMI less than 18.5 is underweight body type
                      A BMI of 18.5 – 24.9 is normal weight body type
                      A BMI of 25.0 – 29.9 is overweight body type
                      A BMI of 30.0 – 39.9 is obese body type
                      A BMI of 40.0 or higher is severely (or morbidly) obese body type



            …………………………………………………………………………….……

            ………………………………………………………………………………….

            …………………………………………………………………………….……

            ………………………………………………………………………………….
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 10


5.    A forensic scientist uses paper chromatography to analyse lipstick used to leave a
      message on a mirror at a crime scene. The lipstick was first dissolved in a solvent
      and then spotted onto the chromatography paper at position A. Five known lipsticks
      were then spotted at positions B through to F.

      (a)    The forensic scientist uses the following apparatus to carry out the paper
             chromatography.



                                                                  Lid




                                                            chromatography paper




                                                        solvent




             She uses a solvent that is a mixture of water and acetone (propanone).
             Acetone is a volatile liquid. Why is it important that the lid is placed upon the
             apparatus?                                                                      [1]

             ……………………………………………………………….........…………...........

             ……………………………………………………………….........…………...........

             ………………………………………………………………………………………..
                GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 11


  (b)    The results of the experiment are shown below.



                                                                        Position to which
                                                                        the solvent
Paper                                                                   travelled

length
5 cm




                   A     B      C     D     E       F                   Pencil base line



         (i)      Make a conclusion, with a reason, about the lipstick found at the crime
                  scene using the results shown below.                                 [2]

         …………………………………………………………………………….……........

         ………………………………………………………………………………….........

         ………………………………………………………………………………….........

         (ii)     Two dyes in the lipstick samples C are not completely separated.
                  Give one way in which the experiment could be changed to improve
                  the separation.                                                  [1]

         …………………………………………………………………………….……........

         ………………………………………………………………………………….........

         ………………………………………………………………………………….........
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 12


6.    A number of drums have been dumped by the roadside. One of them contains a
      white powder. An Environmental Protection Officer (EPO) is asked to find out what
      the drum contains.




      (a)     The EPO needs to take a sample back to the lab for analysis. Give a reason
              why she should take more than one sample from the drum.                  [1]

              …………………………………………………………………………….……........

              ………………………………………………………………………………….........

      (b)     At the laboratory she tests the white powder to identify it. Complete the
              following table to make conclusions from the results she obtained.

                  Test                     Observation                   Conclusion

                                                                  …………………………….
      (i)   Flame test              Orange flame
                                                                  …………………………….


      (ii) Add nitric acid                                        ………………………….…
           followed by silver       White precipitate formed
           nitrate solution                                       ……………………………..

                                                                                          [2]

      (c)     Use the test results above and the information in page 23 to work out the
              formula of the compound present in the drum.
                                                                                          [1]
              …………………………………………………………………………………
                 GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 13


7.   A sports nutritionist advises an athlete on his Personal Energy Requirements.
     This is given by the following equation.

     Personal energy requirement =

                    basic energy requirement (BER) + extra energy requirement

     The BER depends on body mass. For every kilogram, we need 130 kJ of energy
     every day.

     The extra energy requirement depends on how active the athlete is. For each hour's
     training, the athlete needs 30 kJ of energy for each kg of body mass.

     The sports nutritionist uses scales and finds a mass of an athlete to be 70 kg.

     (i)      Calculate the daily BER for the athlete.                                 [1]




                                                                 BER = ……………………kJ

     (ii)     The athlete trains for two hours during the day.
              Calculate the extra energy requirement.                                  [1]




                                                Extra energy requirement = …………….kJ

     (iii)    What is the personal energy requirement of the athlete for the day?      [1]

              …………………………………………………………………………………….
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 14


8.    A physiologist can monitor the performance of a footballer in a number of ways.
      One measure of performance is lung function.

      (a)      Suggest one reason why it is important for a footballer to have a healthy
               lung function.                                                            [1]

               ……………………………………………………………………………………

               …………………………………………………………………………………….

      (b)      The diagram shows some of the structures in the chest.




             Explain how these structures work together when we breathe in air. [6 QWC]

             ………………………………………………………………………………………

             ………………………………………………………………………………………

             ………………………………………………………………………………………

             ………………………………………………………………………………………

             ………………………………………………………………………………………

             ………………………………………………………………………………………

             ………………………………………………………………………………………
                     GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 15


(c)          A physiologist measured the breathing rate of three different footballers
             before, during and after a training exercise. The results are shown below.
             The exercise stops after 6 minutes for each player.

                                                     Time (minutes)

                                  0      2      4     6      8     10     12    14     16
Breathing rate




                     Player 1     16    32     49     60    35     22     17    16     16
  (breaths /
   minute)




                     Player 2     17    34     52     65    47     34     25    19     17

                     Player 3     18    34     51     66    40     24     18    18     18



             (i)        Suggest one way in which you could make it easier to compare the
                        results obtained by the physiologist.                            [1]

                        …………………………………………………………………………………

                        …………………………………………………………………………………

             (ii)       How long did it take for the breathing rate to return to normal for
                        player 3 after exercise was stopped?                                  [1]

                        …………………………………………………………………………………

             (iii)      Examine the results for each of the players and state which player is
                        least fit, giving a reason for your answer.                          [2]

                        …………………………………………………………………………………

                        …………………………………………………………………………………

                        …………………………………………………………………………………
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 16


9.    The world population is growing quickly. There is concern that we are not producing
      enough food to feed all the population. Farmers are encouraged to use intensive
      farming methods. One method of intensive farming is keeping battery hens.




      (i)    Give two advantages of keeping battery hens.                              [2]

             …………………………………………………………………………….……........

             ………………………………………………………………………………….........

             ………………………………………………………………………………….........

             ………………………………………………………………………………….........

      (ii)   Suggest two reasons why some people will only buy free range eggs.        [2]

             ………………………………………………………………………………….........

             ………………………………………………………………………………….........

             ………………………………………………………………………………….........
                   GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 17


10.   (a)   Materials scientists have developed a wide range of materials for different
            applications. Draw a line connecting a material to an application it is used for.
                                                                                           [4]

              Kevlar®                                   Catalytic converter



              Titanium                                  Bullet proof vests



              Ceramic beads                             Cycle safety helmet



              Expanded
                                                        Aircraft engines
              polystyrene

      (b)   Sports scientists choose materials for equipment to improve performance of
            athletes.

            Frames for mountain bikes can be made from a number of materials which
            include aluminium alloys, steel alloys and titanium. Mountain bikes need to
            support the weight of the rider and absorb shock without breaking or
            deforming.

            (i)      State what is meant by an alloy.                                      [1]

                     …………………………………………………………………………………

                     …………………………………………………………………………………

            (ii)     A model of a metal is shown below. Use this model to give a reason
                     why metals are malleable.                                          [1]


                                                                              Key

                                                                              Metal
                                                                              atom




                     …………………………………………………………………………………

                     …………………………………………………………………………………

                     …………………………………………………………………………………

                     …………………………………………………………………………………
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 18


             (iii)   Use the information in the following table to explain which material is
                     most suitable to build the frame of a high performance mountain bike.
                                                                                            [3]


                                                    Density            Tensile Strength
                            Material
                                                    (g/cm3)                (MPa)

                      Carbon fibre                    1.7                    5600
                      Steel alloy                     7.8                    860
                      Aluminium alloys                2.7                    483
                      Titanium                        4.5                     900

                     …………………………………………………………………………………

                     …………………………………………………………………………………

                     …………………………………………………………………………………

                     …………………………………………………………………………………

                     …………………………………………………………………………………
                  GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 19


11.   A company makes orange flavoured chewing gum. Marcus checks samples from
      batches of the chewing gum to make sure that it contains the right amount of citric
      acid with is flavouring. He follows the following standard procedure.

       Step 1          Take one piece of orange flavoured bubble gum, unwrap it and
                       place on a wood block.
       Step 2          With a kitchen rolling pin, roll the gum into a very thin strip approx
                       160 x 130 x 0.5 mm. Cut the thin strip into small pieces about the
                       size of long grain rice.
       Step 3          Weigh out accurately about 1.00 g of gum bits into a 250 cm3
                       conical flask.
       Step 4          Pour 100 cm3 of distilled water into the flask. Add a magnetic
                       follower and stopper.
       Step 5          Stir vigorously for 30 minutes making sure the bubble gum bits do
                       not stick together
       Step 6          Add 0.5 cm3 of phenolphthalein indicator solution and titrate with 0.1
                       mol dm-3 sodium hydroxide contained in a 10 cm3 burette. The end-
                       point is when a pink colour appears and remains after 15 seconds.
                       Record the titre.
       Step 7          Repeat twice more and average all three results.

      (a)    Give one reason why Marcus uses a standard procedure for analysing citric acid.
                                                                                         [1]

             …………………………………………………………………………….................

             …………………………………………………………………………….................
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 20


       (b)        Marcus obtained the following titration results.

                                    Run 1                Run 2                 Run 3
        Final volume
                                     6.40                 6.60                  6.75
             (cm3)
        Initial volume
                                     0.00                 0.15                  0.25
             (cm3)

             Titre (cm3)             6.40                 6.45                  6.50


                 (i)       Confirm that the average titre is 6.45 cm3. Show your workings.       [1]

                           …………………………………………………………………………….....

                           …………………………………………………………………………….....

                           …………………………………………………………………………….....

                 (ii)      The mass of chewing gum in the sample is calculated using the
                           formula:

                           mass of citric acid in 100 g of gum = t x 0.71 g

                           where t = the average titre

                           Use the average titre and the formula to calculate the mass of citric
                           acid in 100 g of gum.                                                 [1]




                                                          Mass citric acid in 100 g = …………… g

      (c)        Which word best describes the results obtained in the procedure above?          [1]

                 Underline the correct answer

                 qualitative                      quantitative                  semi-quantitative
                                                                        GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 21


12.                                                 (a)          It is important that we produce sufficient food to feed the world’s growing
                                                                 population. Since 1960 global cereal production has increased. Use the
                                                                 following charts to help you answer the questions that follow.


                                                                                                                                                              Global cereal production
                                                            Global land used for arable farming
                                              1600                                                                                                1.8

                                              1400                                                                                                1.6




                                                                                                              Global cereal production (10 9
            Arable land (million hectares)




                                              1200                                                                                                1.4

                                              1000                                                                                                1.2




                                                                                                                      megatonnes)
                                                                                                                                                       1
                                                800
                                                                                                                                                  0.8
                                                600
                                                                                                                                                  0.6
                                                400
                                                                                                                                                  0.4
                                                200
                                                                                                                                                  0.2
                                                    0
                                                                                                                                                       0
                                                            1960        1970       1980        1990                                                         1960        1970          1980   1990
                                                                                Year
                                                                                                                                                                               Year




                                                                 Global pesticide production                                                                  Global fertiliser production

                                              3.5                                                                                                 70
  Global pestiside production (10 6 tonnes)




                                                                                                             6




                                               3                                                                                                  60
                                                                                                             Nitrogen fertiliser production (10




                                              2.5                                                                                                 50

                                               2
                                                                                                                          tonness)




                                                                                                                                                  40

                                              1.5                                                                                                 30

                                               1                                                                                                  20

                                              0.5                                                                                                 10

                                               0                                                                                                  0
                                                          1960           1970          1980           1990                                                 1960         1970          1980   1990
                                                                                Year                                                                                           Year




                                                                 (i)        Calculate how much the global cereal production increases by
                                                                            between 1960 and 1990.                                                                                           [1]

                                                                            …………………………………………………………………………………

                                                                 (ii)       Explain the increase in global cereal production between 1960 and
                                                                            1990 in the light of the information provided above.              [3]

                                                                            …………………………………………………………………………

                                                                            …………………………………………………………………………

                                                                            …………………………………………………………………………

                                                                            …………………………………………………………………………

                                                                            …………………………………………………………………………

                                                                            …………………………………………………………………………
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 22


      (b)    The final results of the Farm Scale Evaluations of herbicide tolerant GM crops
             were announced in 2003. These crops were genetically modified to be
             tolerant of a ‘broad-spectrum’ herbicide, which kills a wide range of weeds.

             The trial allowed the farmer growing the GM crop to use only one application
             of a broad-spectrum herbicide to control the weeds. Farmers usually have to
             use more than one herbicide to protect a conventional crop. Using broad-
             spectrum herbicides on conventional crops would kill the crop as well as the
             weeds.

             Trial results are recorded below.

             Crop                         Compared to a conventional crop
             GM winter rape                      •   same number of weeds overall
                                                 •   more grass weeds but fewer overall
                                                 •   more grass
                                                 •   fewer butterflies and bees
             GM spring rape and beet             •   fewer weeds
                                                 •   fewer seeds
                                                 •   fewer bees and butterflies
                                                 •   more springtails*
             GM maize                            •   more weeds
                                                 •   more seeds
                                                 •   more bees and butterflies
                                                 •   more springtails*

            *Springtails are insects.

             (i)    One of the above crops was granted approval by the government for
                    commercial cultivation. State which you think this was, and give a
                    reason for your answer.                                            [2]

                    …………………………………………………………………………………

                    …………………………………………………………………………………

                    …………………………………………………………………………………

                    …………………………………………………………………………………

             (ii)   Reread the introduction to this question and suggest how changing
                    the conditions of the trial could have changed the outcome.       [2]

                    …………………………………………………………………………………

                    …………………………………………………………………………………

                    …………………………………………………………………………………

                    …………………………………………………………………………………
                 GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 23


                     FORMULAE FOR SOME COMMON IONS



             POSITIVE IONS                             NEGATIVE IONS

NAME                         FORMULA      NAME                           FORMULA

Aluminium                    Al3+         Bromide                        Br-

Ammonium                     NH4+         Carbonate                      CO32-

Barium                       Ba2+         Chloride                       CI-

Calcium                      Ca2+         Fluoride                       F-

Copper(II)                   Cu2+         Hydroxide                      OH-

Hydrogen                     H+           Iodide                         I-

Iron(II)                     Fe2+         Nitrate                        NO3-

Iron(III)                    Fe3+         Oxide                          O2-

Lithium                      Li+          Sulfate                        SO42-

Magnesium                    Mg2+

Nickel                       Ni2+

Potassium                    K+

Silver                       Ag+

Sodium                       Na+
                  GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 25



           Candidate Name                      Centre Number            Candidate Number
                                                                       0


                     GCSE

                     ADDITIONAL APPLIED SCIENCE

                     HIGHER TIER (Grades D - A* )

                     UNIT 1: SCIENCE AT WORK

                     SPECIMEN PAPER

                     1 hour

                                                        For Examiner’s use only
                                                                Maximum       Mark
                                                    Question
                                                                  Mark      Awarded
                                                       1.           3
                                                        2.              4
                                                        3.             10
                                                        4.              4
                                                        5.              7
                                                        6.              4
                                                        7.              8
                                                        8.             10
                                                        9.              6
                                                        10.             4
                                                      Total            60

ADDITIONAL MATERIALS
   In addition to this examination paper, you may require a calculator and ruler.
INSTRUCTIONS TO CANDIDATES
  Write your name, centre number and candidate number in the spaces at the top of this
  page.
  Answer all questions.
  Write your answers in the spaces provided in this booklet.
INFORMATION FOR CANDIDATES
  The number of marks is given in brackets at the end of each question or part-question.
  You are reminded that assessment will take into account the quality of written
  communication used in your answers to question 3(b) and 7(i).
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 26


1.    A sports nutritionist advises athletes on their Personal Energy Requirement. This is
      given by the following equation:

      Personal energy requirement = basic energy requirement (BER) + extra energy
                                                                     requirement

      The BER depends on body mass. For every kilogram, we need 130 kJ of energy
      every day.

      The extra energy requirement depends on how active the athlete is. For each hours
      training, the athlete needs 30 kJ of energy for each kg of body mass.

      The sports nutritionist uses scales and finds the mass of an athlete to be 70 kg.

      (i)     Calculate the daily BER for the athlete.                                                                               [1]




                                                                                                       BER = .................. kJ

      (ii)    The athlete trains for two hours during the day.
              Calculate the extra energy requirement.                                                                                [1]




                                                                        Extra energy requirement = ................ kJ

      (iii)   What is the personal energy requirement of the athlete for the day?                                                    [1]

              ...........................................................................................................................
                GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 27


2.   A company makes orange flavoured chewing gum. It uses citric acid as flavouring in
     the chewing gum. Marcus works in the quality control laboratory at the company. He
     checks samples from batches of the chewing gum to make sure that it contains the
     right amount of citric acid. He follows the following standard procedure.

      Step 1         Take one piece of orange flavoured bubble gum, unwrap it and
                     place on a wood block.
      Step 2         With a kitchen rolling pin, roll the gum into a very thin strip approx
                     160 x 130 x 0.5 mm. Cut the thin strip into small pieces about the
                     size of long grain rice.
      Step 3         Weigh out accurately about 1.00 g of gum bits into a 250 cm3
                     conical flask.
      Step 4         Pour 100 cm3 of distilled water into the flask. Add a magnetic
                     follower and stopper.
      Step 5         Stir vigorously for 30 minutes making sure the bubble gum bits do
                     not stick together.
      Step 6         Add 0.5 cm3 of phenolphthalein indicator solution and tritrate with
                     0.1 mol dm-3 sodium hydroxide contained in a 10 cm3 burette. The
                     end-point is when a pink colour appears and remains after 15
                     seconds. Record the titre.
      Step 7         Repeat twice more and average all three results.

     (a)    Give one reason why Marcus uses a standard procedure for analysing citric acid.
                                                                                        [1]

            ……………………………………………………………………………................

            ……………………………………………………………………………................
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 28


       (b)        Marcus obtained the following titration results.

                                         Run 1                           Run 2                            Run 3
        Final volume
                                           6.40                            6.60                            6.75
             (cm3)
        Initial volume
                                           0.00                            0.15                            0.25
             (cm3)

             Titre (cm3)                   6.40                            6.45                            6.50


                 (i)       Marcus is an experienced technician. Give one reason why there are
                           small differences between the titres (titration results) he obtained
                           above.                                                               [1]

                           ..............................................................................................................

                           ..............................................................................................................

                 (ii)      Confirm that the average titre is 6.45 cm3. Show your workings.                                            [1]

                           ..............................................................................................................

                           ..............................................................................................................

                           ..............................................................................................................

                 (iii)     The mass of chewing gum in the sample is calculated using the
                           formula:

                           mass of citric acid in 100 g of gum = t x 0.71 g

                           where t = the average titre (titration reading)

                           Use the formula to calculate the mass of citric acid in 100 g of gum. [1]




                                                                           Mass citric acid in 100 g = …………… g
                     GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 29


3.   A physiologist can monitor the performance of a footballer in a number of ways. One
     measure of performance is lung function.

     (a)      Suggest one reason why it is important for a footballer to have a healthy lung
              function.                                                                    [1]

              ...........................................................................................................................

              ...........................................................................................................................

              ...........................................................................................................................

     (b)      The diagram shows some of the structures in the chest.




                                                                                                    intercostal muscles



           lung
                                                                                                                ribs




                                                diaphragm


              Explain how these structures work together when we breathe in air. [6 QWC]

              ...........................................................................................................................

              ...........................................................................................................................

              ...........................................................................................................................

              ...........................................................................................................................

              ...........................................................................................................................

              ...........................................................................................................................

              ...........................................................................................................................
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 30


      (c)          The physiologist measured the breathing rate of three different footballers
                   before, during and after a training exercise. The results are shown below.
                   The exercise stops after 6 minutes for each player.

                                                                           Time (minutes)

                                               0         2         4         6         8        10        12        14        16
      Breathing rate




                          Player 1            16        32        49        60        35        22        17        16        16
        (breaths /
         minute)




                          Player 2            17        34        52        65        47        34        25        19        17

                          Player 3            18        34        51        66        40        24        18        18        18


                   (i)        Suggest one way in which you could make it easier to compare the
                              results obtained by the physiologist.                            [1]

                   ...........................................................................................................................

                   ...........................................................................................................................

                   (ii)       Examine the results for each of the players and state which player is
                              least fit, giving a reason for your answer.                          [2]

                   ...........................................................................................................................

                   ...........................................................................................................................

                   ...........................................................................................................................

                   ...........................................................................................................................
                    GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 31


4.   A number of drums have been dumped by the roadside. One of them contains a
     white powder. An Environmental Protection Officer (EPO) is asked to find out what
     the drum contains.




     (a)     The EPO needs to take a sample back to the lab for analysis. Give a reason
             why she should take more than one sample from the drum.                  [1]

             ..........................................................................................................................

             ..........................................................................................................................

     (b)     At the laboratory she tests the white powder to identify it. The EPO carries
             out the following tests on the powder. Complete the conclusion for each test.

                  Test                                    Observation                                    Conclusion

                                                                                             …………………………….
     (i)   Flame test                          Lilac flame
                                                                                             …………………………….


                                                                                             ………………………….…
     (ii) Add barium chloride
                                               White precipitate formed
          solution
                                                                                             ……………………………..

                                                                                                                                     [2]

     (c)     Use the results to your test above and the information on page 39 to work out
             the formula of the powder.
                                                                                        [1]
             Formula ………………………………………
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 32


5.    Sports scientists choose materials for equipment to improve performance of athletes.

      Frames for mountain bikes can be made from a number of materials which include
      aluminium alloys, steel alloys and titanium. Mountain bikes need to support the
      weight of the rider and absorb shock without breaking or deforming.

      (i)      State what is meant by an ‘alloy’.
                                                [1]
               …………………………………………………………………………………………

               ………………………………………………………………………………………...

      (ii)     Explain, in terms of the structure of metals and alloys, why alloys are often
               less malleable than pure metals.
                                                [3]
               …………………………………………………………………………………………

               …………………………………………………………………………………………

               …………………………………………………………………………………………

               …………………………………………………………………………………………

               …………………………………………………………………………………………

       (iii)   Use the information in the following table to explain which material is most
               suitable to build the frame of a high performance mountain bike.
                                                                                               [3]

                                                               Tensile
                                           Density
                     Material                                  Strength
                                           (g/cm3)
                                                               (MPa)
                     Steel alloy           7.8                 860
                     Aluminium alloy       2.7                 483
                     Titanium              4.5                 900

               …………………………………………………………………………………………

               …………………………………………………………………………………………

               ………………………………………………………………………………………...

               …………………………………………………………………………………………

               ………………………………………………………………………………………...
                                                                           GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 33


6.                                                      It is important that we produce sufficient food to feed the world’s growing population.
                                                        Explain the increase in global cereal production between 1960 and 1990 in the light
                                                        of the information provided below.
                                                                                                                                              [4]
                                                                    Global cereal production                                                                Global land used for arable farming

                                                       1.8                                                                                           1550

                                                       1.6




                                                                                                           Land used for arable farming (million
              Global cereal production (10 9




                                                                                                                                                     1500
                                                       1.4

                                                       1.2
                      megatonnes)




                                                                                                                                                     1450
                                                        1




                                                                                                                         hecatres)
                                                       0.8                                                                                           1400

                                                       0.6
                                                                                                                                                     1350
                                                       0.4
                                                       0.2                                                                                           1300

                                                        0
                                                               1960           1970          1980   1990                                              1250
                                                                                                                                                             1960         1970          1980      1990
                                                                                     Year
                                                                                                                                                                                 Year




                                                                     Global pesticide production                                                                Global fertiliser production

                                                 3.5
                                                                                                                                                      70
     Global pestiside production (10 6 tonnes)




                                                                                                               6




                                                  3
                                                                                                                                                      60
                                                                                                                Nitrogen fertiliser production (10




                                                 2.5
                                                                                                                                                      50

                                                  2
                                                                                                                             tonness)




                                                                                                                                                      40

                                                 1.5
                                                                                                                                                      30
                                                  1
                                                                                                                                                      20
                                                 0.5
                                                                                                                                                      10
                                                  0
                                                             1960            1970           1980    1990                                               0
                                                                                                                                                            1960          1970          1980      1990
                                                                                     Year
                                                                                                                                                                                 Year




                                                   ……………………………………………………………………………………………

                                                   ……………………………………………………………………………………………

                                                   ……………………………………………………………………………………………

                                                   ……………………………………………………………………………………………

                                                   ……………………………………………………………………………………………

                                                   ……………………………………………………………………………………………

                                                   ……………………………………………………………………………………………
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 34


7.    A trainer is explaining to a shot putter about the muscles in the upper arm shown in
      the diagram.




      (i)    Explain how this pair of muscles and the structure of the synovial joint enables
             the movement of the lower arm.                                           [6 QWC]

             …………………………………………………………………………………….

             …………………………………………………………………………………….

             …………………………………………………………………………………….

             …………………………………………………………………………………….

             …………………………………………………………………………………….

             …………………………………………………………………………………….

      (ii)   Explain why shot-putters need a strong triceps muscle.                       [2]

             …………………………………………………………………………………….

             …………………………………………………………………………………….

             …………………………………………………………………………………….
                                    GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 35


8.              Jacqueline has been a known drug user. She now claims to have been drug free for
                the last 90 days. Prior to this period she admits to using the drug LSD. She needs to
                show she has not used drugs for the previous 90 days. This is achieved by testing a
                sample of her hair (usually about 50 strands) using gas chromatography (GC). Hair
                grows at the rate of 1 mm every three days. Timegate Laboratories offer forensic
                testing of hair.

                (a)         (i)       Show that the laboratory needs to analyse a 3 cm section of hair to
                                      prove that Jacqueline has not used drugs for 90 days.               [1]

                                      …………………………………………………………………………………

                            (ii)      The diagram below shows a strand of hair taken from Jacqueline.

                                      Mark on the diagram the section of hair that could be analysed to
                                      show her drug use in the last 90 day period. Label this period ‘A’.
                                      Also mark on the diagram the section of hair that could be analysed to
                                      show her drug use in the previous 90 day period. Label this period ‘B’.
                                                                                                           [2]

                             cm
                             0        1      2     3   4   5     6    7    8     9    10



Strand of hair
 Most recent                                                                                 Oldest growth
 growth

                (b)         The laboratory analyses Jacqueline’s hair for the last 90 days (sample A) and
                            the previous 90 days (sample B). Below are the results of GC analysis of
                            Jacqueline’s hair. All results were obtained under the same conditions. Under
                            these conditions, the retention time of LSD is 3.0 minutes.

Sample A
     Response




                0     0.5          1.0 1.5       2.0 2.5 3.0 3.5     4.0 4.5    5.0
                                                                Time (minutes)
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 36


             Sample B
  Response




             0     0.5     1.0 1.5     2.0 2.5 3.0 3.5        4.0 4.5     5.0
                                                          Time (minutes)

                         Examine the results above and explain if they are consistent with Jacqueline’s
                         claims.                                                                    [3]

                         …………………………………………………………………………………………

                         …………………………………………………………………………………………

                         …………………………………………………………………………………………

                         …………………………………………………………………………………………

             (c)         Explain how a mixture is separated in chromatography.                      [4]

                         …………………………………………………………………………………………

                         …………………………………………………………………………………………

                         …………………………………………………………………………………………

                         …………………………………………………………………………………………

                         …………………………………………………………………………………………
                   GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 37


9.   Healthy plant growth requires the presence of nutrients. The following pictures are of
     tomato plants that are each deficient in a different nutrient.


     Plant A                                                                  Plant B
     Deficient in nitrogen                                                    Deficient in phosphorus
     Stunted growth                                                           Growth dwarfed and thin




     In each case explain how the symptoms of the nutrient deficiency are linked to the
     role of the nutrient in the plant.

     (i)    Plant A                                                                                                                [3]

            ............................................................................................................................

            ............................................................................................................................

            ............................................................................................................................

            ............................................................................................................................

            ............................................................................................................................

     (ii)   Plant B                                                                                                                [3]

            ............................................................................................................................

            ............................................................................................................................

            ............................................................................................................................

            ............................................................................................................................

            ............................................................................................................................
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 38


10.    A farmer improves crop production by using improved drainage, using additional
       applications of pesticides and planting the crop in the autumn rather than spring.
       Explain how these changes may affect plant diversity.                              [4]

       .......................................................................................................................................

       .......................................................................................................................................

       .......................................................................................................................................

       .......................................................................................................................................

       .......................................................................................................................................

       .......................................................................................................................................
                 GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 39


                     FORMULAE FOR SOME COMMON IONS



             POSITIVE IONS                             NEGATIVE IONS

NAME                         FORMULA      NAME                           FORMULA

Aluminium                    Al3+         Bromide                        Br-

Ammonium                     NH4+         Carbonate                      CO32-

Barium                       Ba2+         Chloride                       CI-

Calcium                      Ca2+         Fluoride                       F-

Copper(II)                   Cu2+         Hydroxide                      OH-

Hydrogen                     H+           Iodide                         I-

Iron(II)                     Fe2+         Nitrate                        NO3-

Iron(III)                    Fe3+         Oxide                          O2-

Lithium                      Li+          Sulfate                        SO42-

Magnesium                    Mg2+

Nickel                       Ni2+

Potassium                    K+

Silver                       Ag+

Sodium                       Na+
                  GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 41




General marking instructions

1.    Over-rigidity in the interpretation of the mark scheme is not intended and it is
      accepted that points may be made in a variety of different ways including converse
      and counterpoints. Therefore, correct responses, even if expressed differently, are
      acceptable provided the points are explicit, unambiguous and made in the correct
      context. Note however, that in many answers, specific terms are a requirement.

2.    Allow phonetic spelling except where there is a possibility that scientific terms might
      be confused.

3.    When candidates list alternative answers to short answer questions, the general
      principle to be followed is: right + wrong = no mark. In a question requiring a set
      number of responses, where a candidate has supplied extra responses above the
      required number each error/contradiction negates one correct response, however
      responses considered neutral are not penalised.

4.    The principle of error carried forward is generally applied where an incorrect value
      calculated in one part of a question is treated as being correct for the purposes of
      subsequent parts.

5.    When marking calculations, substitution into an incorrect equation is not credited and
      hence subsequent calculations within that section will score zero.
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 42


               GENERAL CERTIFICATE OF SECONDARY EDUCATION

                           Additional Applied Science Unit 1

                                      Specimen paper

                                   FOUNDATION TIER

1.

              Statement                                           Tick ( ) if       Tick ( ) if
                                                                     true              false
              both muscles relax at the same time
              the muscles are called an antagonistic pair
              when the biceps is contracted the triceps is
              relaxed

             1 mark for tick in correct place
             If both true and false ticked for a statement (0)                               [3]


2.    (i)    Symptoms to include one of: stomach pains, sickness or diarrhoea.               [1]

      (ii)   Two from: keeping raw and cooked food separate, maintain hygiene, store
             food at suitable temperature/refrigerate food.                          [2]


3.    (a)    water                                                                           [1]

      (b)    (i)     Circle 1500 cd                                                          [1]

             (ii)    Graph flattens out at higher value / line starts out steeper            [1]


4.    (i)    BMI = 69 (1) or = 35.2 (1)                                                      [1]
                   1.42

      (ii)   Tom is obese (1)

             One mark can be awarded for making a correct and relevant point:

             Tom will have a higher muscle mass (than most) / Tom will be muscular. (1)

             The second mark can only be awarded if the candidate coherently and
             correctly links the conclusion to the statement above.

             Therefore BMI overestimates the amount of Tom's fat. (1)                        [3]
                    GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 43


5.   (a)     The acetone will evaporate from the tank (leaving water)                         [1]

     (b)     (i)      The lipstick at the crime scene matches lipstick F(1). The pattern of
                      dyes that separate in lipstick F matches the pattern for the lipstick at
                      the crime scene. (1)                                                    [2]

             (ii)     Use a longer sheet of chromatography paper / Change the solvent
                      used in the chromatography tank.                                [1]


6.   (a)     There may be more than one powder in the tank / She needs to get a
             representative sample of the powder (in the tank).                               [1]

     (b)     (i)      Sodium (1)

             (ii)     Chloride (ions) present (1)                                             [2]

     (b)     (i)      NaCl (1) (Not NACl, NaCL)                                               [1]


7.   (i)     Subs of 130 x 70 or ans 9100                                                     [1]

     (ii)    30 x 70 x 2 (1) or ans 4200(1)                                                   [1]

     (iii)   13300 or allow error carried forward from previous parts.                        [1]
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 44


8.    (a)    One from intake large volume of air, good gas exchange.
             Accept: takes in more air and absorbs more oxygen.                              [1]

      (b)    Indicative content
                • intercostal muscles contract
                • ribcage expands
                • diaphragm lowers
                • lungs expand/ lung volume increases
                • causing air pressure to drop
                • so air enters them.

             Level 3 responses demonstrate both a detailed understanding of science and
             an effective use of written skills to communicate scientific understanding.
             The candidate constructs a precise and coherent narrative from relevant
             points such as those in the indicative content. The answer fully addresses the
             question with no significant omissions. The candidate makes points in a
             correct context, using appropriate scientific terminology with accurate
             spelling, punctuation and grammar.                                          [5-6]

             Level 2 responses demonstrate some understanding of relevant science and
             mainly appropriate written skills to communicate scientific understanding. The
             candidate makes some relevant points such as those in the indicative content.
             The candidate produces a narrative with a measure of coherence, covering
             points in context using some scientific terminology with mainly accurate spelling,
             punctuation and grammar.                                                      [3-4]

             Level 1 responses show a limited understanding of science and a limited
             ability to meaningfully communicate scientific ideas in writing. The candidate
             has given a limited response with little use of scientific language with
             inaccuracies in spelling, punctuation and grammar. The response is poorly
             structured and limits the candidate’s ability to express their meaning.    [1-2]

             Zero marks will be awarded where the candidate fails to meet the
             requirements of a level 1 response.

      (c)    (i)     Plot the data as a line graph.                                          [1]

             (ii)    10 minutes.                                                             [1]

             (iii)   Player 2 (1)

                     Takes longer for the breathing rate of the player to recover from
                     exercise. (1)                                                           [2]


9.    (i)    Two from: Greater output, less labour, less land used.                          [2]

      (ii)   Animal welfare, reference to quality of eggs.                                   [2]
                    GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 45


10.   (a)   Kevlar®                        Bullet proof vests (1)
            Titanium                       Aircraft engines (1)
            Ceramic beads                  Catalytic convertor (1)
            Expanded polystyrene           Cycle safety helmet (1)                           [4]

      (b)   (i)       Mixture of two elements - one of which is a metal. (1)                 [1]
                      (Not just: mixture of two elements.)

            (ii)      Layers of atoms are able to slide over one another. (1)                [1]

            (iii)     One mark can be awarded for identifying carbon fibre (1)

                      The following marks can only be awarded if the candidate coherently
                      and correctly reasons using the information from the table.

                      This material has highest tensile strength of all three listed so can be
                      used to make a strong frame. (1)
                      It is also the least dense so is suitable to make a light frame. (1)   [3]


11.   (a)   One of: reproducibility or repeatability. (1)                                    [1]
            (Not: makes work more accurate.)

      (b)   (i)       Workings must be shown: (6.40 + 6.45 + 6.55)/3                         [1]

            (ii)      Mass = 6.45 x 0.71 = 4.58 g (1) (also accept 4.6 g, 4.5 g, 4.57 g)     [1]

      (c)   quantitative                                                                     [1]


12.   (a)   (i)       Cereal production has doubled/ increased twofold/twice/ increased
                      100%. (1)                                                         [1]

            (ii)      Two marks can be awarded for correct and relevant points:

                      Land usage for farming has only increased slightly/ hardly increased/
                      hardly changed (1).
                      Global fertiliser production and pesticide use has increased
                      dramatically (in the same period) (1).

                      The third mark can only be awarded if the candidate coherently and
                      correctly links the conclusion to the points above.

                      Therefore increase in cereal production is due to use of fertilisers and
                      pesticides. (1)                                                        [3]

      (b)   (i)       GM maize.(1) This was the only crop that improved the number of all
                      the species monitored. (1)                                        [2]

            (ii)     If additional applications of herbicide were allowed (1) then this may
                     have decreased the numbers of species monitored. (1)                   [2]
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 46


                 GENERAL CERTIFICATE OF SECONDARY EDUCATION

                            Additional Applied Science Unit 1

                                      Specimen paper

                                        HIGHER TIER


1.    (i)     Subs of 130 x 70 or ans 9100                                                    [1]

      (ii)    30 x 70 x 2 (1) or ans 4200(1)                                                  [1]

      (iii)   13300 or allow error carried forward from previous parts.                       [1]


2.    (a)     One of: leads to reproducibility or repeatability. (1)
              (Not: makes work more accurate.)                                                [1]

      (b)     (i)     Slight differences in judging the colour change at the endpoint/ small
                      differences in making judgements about volumes used in pipettes or
                      burette / limitations in reading scales / limitations of equipment.

                      Do not accept: operator error / making a mistake carrying out the
                      experiment / not filling the burette properly / mistakes in using the
                      apparatus / damaged equipment.                                          [1]

              (ii)    Workings must be shown: (6.40 + 6.45 + 6.55)/3                          [1]

              (iii)   Mass = 6.45 x 0.71 = 4.58 g (also accept 4.6 g, 4.5 g, 4.57 g)          [1]
                  GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 47


3.   (a)   Good oxygen supply needed for (aerobic) respiration (1)                       [1]
           (Not just: need good oxygen supply.)

     (b)   Indicative content
              • Intercostal muscles contract
              • ribcage expands
              • diaphragm lowers
              • lungs expand/ lung volume increases
              • causing air pressure to drop
              • so air enters them.

           Level 3 responses demonstrate both a detailed understanding of science and
           an effective use of written skills to communicate scientific understanding.
           The candidate constructs a precise and coherent narrative from relevant
           points such as those in the indicative content. The answer fully addresses the
           question with no significant omissions. The candidate makes points in a
           correct context, using appropriate scientific terminology with accurate
           spelling, punctuation and grammar.                                          [5-6]

           Level 2 responses demonstrate some understanding of relevant science and
           mainly appropriate written skills to communicate scientific understanding.
           The candidate makes some relevant points such as those in the indicative
           content. The candidate produces a narrative with a measure of coherence,
           covering points in context using some scientific terminology with mainly
           accurate spelling, punctuation and grammar.                                [3-4]

           Level 1 responses show a limited understanding of science and a limited
           ability to meaningfully communicate scientific ideas in writing. The candidate
           has given a limited response with little use of scientific language with
           inaccuracies in spelling, punctuation and grammar. The response is poorly
           structured and limits the candidate’s ability to express their meaning.    [1-2]

           Zero marks will be awarded where the candidate fails to meet the
           requirements of a level 1 response.

     (c)   (i)      Plot data as line graph.                                             [1]

           (ii)     Player 2 (1)

                    Takes longer for the breathing rate of the player to recover from
                    exercise. (1)                                                        [2]
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 48


4.    (a)    There may be more than one powder in tank / to obtain a representative
             sample of the powder (in the tank).                                           [1]

      (b)    (i)     Potassium present. (1)

             (ii)    Sulfate present. (1)                                                  [2]

      (c)    K2SO4                                                                         [1]


5.           (i)     Mixture of two elements - one of which is a metal. (1)                [1]
                     (Not just: mixture of two elements.)

             (ii)    Two marks can be awarded for making correct and relevant points.
                     The third mark can only be awarded if all points are coherently and
                     correctly linked.

                     Metals are malleable because layers of atoms can slide over each
                     other. (1)
                     In an alloy there are some larger atoms present. (1).
                     These make it more difficult for layers to slide over each other. (1)
                     Labelled diagram acceptable to illustrate second and third points. [3]

             (iii)   Two marks can be awarded for making correct and relevant points:

                     Titanium is the strongest / has the highest tensile strength. (1)
                     Less dense than aluminium but greater strength means that less metal
                     will be needed to build the frame. (1)

                     The third mark can only be awarded if the conclusion is coherently
                     and correctly linked to the points above.

                     Titanium is the most suitable. (1)                                    [3]


6.    Three marks can be awarded for making correct and relevant points:

      Global cereal production doubled (between 1960 and 1990). (1)
      Land usage for farming has only increased slightly/ hardly increased/ hardly
      changed. (1)
      Global fertiliser production and pesticide use has increased dramatically (in the same
      period). (1)

      The fourth mark can only be awarded if the candidate coherently and correctly links
      the conclusion to the points above.

      Increase in cereal production is due to use of fertilisers and pesticides. (1)
                                                                                           [4]
                 GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 49


7.   (i)    Indicative content
               • Muscles
                       o muscles operate in pairs, antagonistic pairs
                       o one muscle contracts while other is relaxed
                       o only act on bones when contracting
                       o biceps bends arm, triceps straightens arm
               • Synovial joint
                       o allows smooth movement
                       o cartridge lowers friction
                       o synovial fluid lubricates joint
                       o ligament holds joint/ stabilises joint.

            Level 3 responses demonstrate both a detailed understanding of science and
            an effective use of written skills to communicate scientific understanding.
            The candidate constructs a precise and coherent narrative from relevant
            points such as those in the indicative content. The answer fully addresses the
            question with no significant omissions. The candidate makes points in a
            correct context, using appropriate scientific terminology with accurate
            spelling, punctuation and grammar.                                          [5-6]

            Level 2 responses demonstrate some understanding of relevant science and
            mainly appropriate written skills to communicate scientific understanding. The
            candidate makes some relevant points such as those in the indicative content.
            The candidate produces a narrative with a measure of coherence, covering
            points in context using some scientific terminology with mainly accurate spelling,
            punctuation and grammar.                                                      [3-4]

            Level 1 responses show a limited understanding of science and a limited
            ability to meaningfully communicate scientific ideas in writing. The candidate
            has given a limited response (only one valid and relevant point), with little use
            of scientific language with inaccuracies in spelling, punctuation and grammar.
            The response is poorly structured and limits the candidate’s ability to express
            their meaning.                                                               [1-2]

            Zero marks will be awarded where the candidate fails to meet the
            requirements of a level 1 response

     (ii)   One mark can be awarded for a correct and relevant point. The second mark
            will only be awarded if the two points are coherently and correctly linked.

            Arm straightens to throw shot (1), which is caused by triceps contracting. (1)
                                                                                         [2]
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 50


8.    (a)        (i)    (1 x 90)/3 = 30 mm = 3 cm       Workings must be shown that give
                        correct answer. (1)                                                [1]

                 (ii)

                  cm
                  0     1       2   3   4       5   6    7    8     9   10



Strand of hair
 Most recent                A               B                                  Oldest growth
 growth
                                                                                           [2]

      (b)        Two marks can be awarded for the correct interpretation of the
                 chromatograms:

                 There is no peak at 3 minutes in sample A implying that there is no LSD
                 present. (1). There is a peak at 3 minutes in sample B which is/maybe
                 LSD(1).

                 The third mark can only be awarded if the candidate coherently and correctly
                 links the conclusion to the points above.

                 Therefore these results are consistent with Jacqueline’s claims. (1)      [3]


      (c)        Three marks can be awarded for making correct and relevant points:

                 Separation depends upon differences in the attraction (1)
                 of different molecules/substances (1)
                 for the stationary phase (1) and mobile phase (1)

                 The fourth mark can only be awarded if the candidate coherently and
                 correctly links the points to consequence.

                 This results in some components moving more quickly/slower than others. (1)
                                                                                          [4]
           GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 51


9.    Plant A
      Two marks can be awarded for making relevant and correct points, e.g.

      Nitrogen is found in chlorophyll (1)
      which is required for photosynthesis (1)

      The third mark can only be awarded if the candidate coherently and correctly
      links the points to the symptom

      Therefore plant is less able to make food leading to poor growth (1)          [3]

      Plant B
      Two marks can be awarded for making relevant and correct points, e.g.

      Phosphorus is found in an enzyme (1)
      which is involved in energy transfer in plants (1)

      The third mark can only be awarded if the candidate coherently and correctly
      links the points to the symptom

      Plants are not able to use energy efficiently causing poor growth (1)         [3]


10.   Three marks can be awarded by making correct and relevant points:

      Improving drainage will reduce habitat for plants that prefer wet conditions. (1)
      Pesticides kill insects which may help pollinate plants (1). (Not just ‘kills
      insects’.).
      The crop germinates/ starts growing earlier out competing the weed (1). (Not
      just ‘ crop germinates earlier’.)

      The fourth mark can only be made if the candidate coherently and correctly
      links to the points above.

      Plant diversity will be adversely affected.                                   [4]
 GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 53




Assessment Grids
                  GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 55

                               MARK SPECIFICATION GRID
                      GCSE Additional Applied Science Unit 1
                                  Foundation Tier
Specimen assessment
                      Specification
        Question         cross        Total    AO1    AO2      AO3    QWC
                       reference
       1                  1.3.2         3       3
       2(i)              4.2.13                 1
       (ii)              4.3.10         3       2
       3(a)               4.2.5                 1
       (b)(i)            4.2.12                         1
       (ii)               4.2.6         3               1
       4(i)               1.4.8                         1
       (ii)               1.4.9         4       1       2
       5(a)               3.3.9                         1
       (b)(i)            3.3.11                         1       1
       (ii)               3.3.9         4               1
       6(a)               3.3.1                         1
       (b)(i)            3.3.11                 1
       (ii)              3.3.11                 1
       (c)                3.2.8         4               1
       7(i)               1.4.8                         1
       (ii)               1.4.8                         1
        (iii)            1.4.8          3               1
       8(a)               1.2.4                 1
       (b)                1.2.6                 5       1               6
       (c) (i)            1.4.6                         1
       (ii)               1.4.6                         1
       (iii)              1.4.6         11                      2
       9(i)               4.2.9                 2
       (ii)               4.2.9         4       2
       10(a)             2.2.14                 4
       (b)(i)             2.2.6                 1
       (ii)               2.2.6                 1
       (iii)             2.2.12         9                       3
       11(a)               I.c                  1
       (b)(i)            3.3.12                         1
       (ii)              3.3.12                         1
       (c)                3.3.4         4               1
       12(a)(i)           4.2.3                         1
       (ii)               4.2.3                                 3
       (b)(i)            4.2.16                         2
       (ii)              4.2.18         8               2
       Total                            60      27     24       9
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 56
                            MARK SPECIFICATION GRID
                      GCSE Additional Applied Science Unit 1
                                      Higher Tier
Specimen assessment

                      Specification
         Question        cross         Total    AO1      AO2   AO3    QWC
                       reference
        1(i)               1.4.8                          1
        (ii)               1.4.8         3                1
        (iii)              1.4.8                          1
        2(a)                I.c                     1
        (b)(i)            3.3.12                          1
                                         4
        (ii)           3.3.9/3.3.14                       1
        (iii)             3.3.12                          1
        3(a)               1.2.4                    1
        (b)                1.2.6                    5     1            6
                                         10
        (c)(i)             1.4.6                          1
        (ii)               1.4.6                                2
        4 (a)              3.3.1                          1
        (b)(i)            3.3.11                    1
                                         4
        (ii)              3.2.11                    1
        (c)                3.2.8                          1
        5(i)               2.2.6                    1
        (ii)               2.2.6         7          3
        (iii)             2.2.12                                3
        6                  4.2.3         4                1     3
        7(i)            1.3.2/1.3.5                 6                  6
                                         8
        (ii)               1.3.3                    1     1
        8(a)(i)           3.3.11                          1
        (ii)              3.3.11                          2
                                         10
        (b)               3.3.11                          2     1
        (c)            3.3.6/3.3.7                   4
        9(i)               4.2.2                     1    2
                                         6
        (ii)               4.2.2                     1    2
        10                4.2.16          4          1    3
        Total                            60         27   24     9
                    GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 57




       GCSE Additional Applied Science: Controlled Assessment

Group A Task

Scientific Detection– Oxygen in Stream Water

Context of the Assessment
A number of organisations and agencies, for example the Environmental Agency, are
interested in monitoring the quality of water. One key indicator that is monitored is the
concentration of dissolved oxygen in the water. If this is lowered the water may no longer
support aquatic animals such as fish.
It is the legal responsibility of employers to carry out a risk assessment of all work-based
activities. Risk assessments are normally carried out by a named person within the
organisation. You have been asked to carry out a risk assessment for the analysis of oxygen
in stream water to ensure the safe working of technicians in the laboratory.


What do you need to do?

In this activity you are going to complete a risk assessment for the analysis of stream water.
There are three aspects to the activity that will need to be included in the risk assessment:
   •   The collection of the sample from the stream;
   •   The treatment of the stream water at the sampling site;
   •   The analysis at the laboratory.


Information on the alkali-iodide-azide reagent can be found at
http://www.sciencelab.com/xMSDS-Alkaline_Iodide_Azide_Reagent_Alsterberg-9925574
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 58


Dissolved Oxygen: Standard Procedure

A.    Collection of the water sample

      1.     Fill a 300 cm3 stoppered glass BOD bottle with water
             from the stream. This may be taken from the banks of
             the stream or by entering the stream.


                                                                                BOD Bottle
B.    Treatment of sample at sampling site (before returning the sample to the
      laboratory)

      1.     Add 2 cm3 of manganese sulfate to the collection bottle.

      2.     Add 2 cm3 of alkali-iodide-azide reagent in the same manner.

      3.     Stopper the bottle with care to be sure no air is introduced. Mix the sample by
             inverting several times. If oxygen is present, a brownish-orange cloud of
             precipitate will appear. When this precipitation has settled to the bottom, mix
             the sample by turning it upside down several times and let it settle again.

      4.     Add 2 cm3 of concentrated sulfuric acid slowly via a pipette held just above
             the surface of the sample. Carefully stopper and invert several times to
             dissolve the precipitate.

C.    Analysis at laboratory

      1.     In a glass flask, titrate 200 cm3 of the sample with sodium thiosulfate to a pale
             straw colour. Titrate by slowly dropping titrant solution from a burette into the
             flask and continually stirring the sample of water.

      2.     Add 2 cm3 of starch solution so a blue colour forms.

      3.     Continue slowly titrating until the sample turns colourless. As this experiment
             reaches the endpoint, it will take only one drop of the tritrant to eliminate the
             blue colour.
                                                                                            GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 59




Generic Mark Scheme for Task A

                                       Level 1                                               Level 2                                              Level 3
                   The candidate identifies some hazards and risks     The candidate writes a risk assessment which           The candidate writes a complete and suitable
                   associated with the activity. Not all significant   identifies the significant hazards with the activity   risk assessment for the activity. (S)he
                   hazards or risks are identified.                    and risks associated with the activity. (S)he          accurately describe all the reasonable hazards
                                                                       identifies some suitable control measures.             and risks associated with the activity. Where
                   The candidate demonstrates limited ability to                                                              necessary, (S)he identifies suitable and sensible
                   communicate their knowledge and                     The candidate demonstrates a reasonable ability        control measures for hazards/risks listed.
                   understanding of safety issues.                     to communicate their knowledge and
                                                                       understanding of safety issues.                        The candidate demonstrates an ability to
 Managing Safety




                   The candidate makes limited use of appropriate                                                             communicate their knowledge and
                   English (spelling/grammar) and scientific           The safety report is clearly presented with a          understanding of safety issues to a high
                   language. His/her work is limited by poor           largely appropriate and accurate use of English        standard.
                   structure.                                          (grammar and spelling).
                                                                                                                              The safety report is presented to a high standard
                                                                       (S)he often uses scientific language and               with an appropriate and accurate use of English.
                                                                       terminology appropriately.                             (S)he consistently uses language (including
                                                                                                                              scientific language) accurately and
                                                                                                                              appropriately.

                                          1-4                                                  5-8                                                  9-12

                                                                                                                                                   Total Available Marks: 12


                     Zero marks to be awarded where there is insufficient evidence to achieve a mark at level 1.
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 60


Teacher Guidance

You are referred to the specification pages 28 - 30 which stipulate the conditions for
controlled assessment.

Further Guidance on Supervision and Time

Candidates will need to research hazards prior to devising the method. This activity
including the research should be carried out under informal supervision. Candidates will
require access to information on hazards, such as Student Safety Sheets or an on-line
electronic database.

Learners will need a 50 minute session to research the activity and a second 50 minute
session to complete the activity.

Preparing learners for the activity

    •   Candidates should be made familiar with the requirements of risk assessments by
        carrying out risk assessments for practical investigations they have completed in
        class. Candidates should have had an opportunity to consider both the hazards and
        risks associated with both the procedures and materials they use. Candidates should
        also have had an opportunity to consider hazards with carrying out ‘field work’.

Task Marking

The work of each candidate should be assessed in each of the following fields:

•   Communicating Science
•   Managing Safety.

When assessing candidates the following points need to be kept in mind:

        1.     The bands are hierarchical, however, a "best fit" approach should be adopted,
               i.e. minor shortcomings at one level can be overcome by a candidate clearly
               meeting the additional demands of a higher level.

        2.     Centres are required to annotate work to show which level is achieved in
               each field and to indicate the evidence for the achievement of the level and
               position within the level.

        3.     The marks for each of the fields should be entered into the table on the
               controlled assessment cover sheet and the authenticating declarations by the
               candidate and teacher/lecturer signed and dated.

        4.     A single mark for Task A out of 14 needs to be submitted.
                     GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 61



GCSE Additional Applied Science: Controlled Assessment

Group B Task


Sports Science – Clothing Fit for Cycle Racing

Context of the Assessment
You are a scientist working for a manufacturer of sports clothing. You have been asked to
test a number of materials to see which is the most suitable to be used in the manufacture of
clothing for cyclists. Sprint cycling can be won by fractions of seconds. Anything which
makes fractions of seconds of a difference can win a race.
•    The movements by a cyclist force the clothing worn to stretch and move a great deal and
     then return to “normal”.
•    The last thing the cyclist wants is that during a race the clothing rips which will be
     distracting and also increasing friction.
This means we need to test the material for the following properties:
1.      How well it will stretch without tearing and return to its original shape.
2.      How strong it is so that it will not snap/tear.




What do you need to do?

1.      You need to devise a method to measure one of the following properties:

        •   stretch – best behaviour or
        •   strength of the material - strongest

        Your teacher will direct one which you should do.

        You will be testing five different materials:

                          cotton       silk     wool        nylon      terylene

        When you do this remember:

        •   Your method should include the equipment you need as well as how you will use
            it.
        •   You will need to have some way to make the samples of material similar – to
            compare/measure like with like.
        •   Your employer needs to be confident in your judgement so you will need to arrive
            at results which are as reliable and as useable as possible.
        •   You should remember the “normal rules” which apply to all scientific testing.
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 62


2.    Use your procedure to collect and record data about the materials and the property
      about them which you are testing – remembering the need for reliable results, results
      which provide the answer to your problem. But before you do this, make sure that
      you show your method to your supervisor so that (s)he can ‘approve’ your procedure.

3.    Your teacher will give you data on the other property that needs to be tested.
      These will be given to you before you start the next step.

4.    You must now present and analyse the data from the test you have gained and
      also use the data given to you by your teacher in a way which:

      •   will allow you to find the solution to answer the question;
      •   will clearly present to your company the information about the material;
      •   will allow you to easily state which material is best fit for purpose.

      Remember you will need to present your results in the most appropriate style.
      You should remember that this is a scientific study and that normally points to
      certain styles of presenting data.

5.    Make conclusions using the evidence you have collected. Remember the two
      problems that you are considering from the introduction.

6.    Now that you have gathered all your results and presented your conclusions it is time
      to evaluate – to make a decision as to how good your evidence really is.

      •   Evaluate the methods which have been used:

             how “suitable” was the method?
             were there any weaknesses or “not quite rights”?
             try to think of a way to improve your method.

      •   Evaluate the quality of your data/evidence:

             were your results convincing – beyond any shadow of a doubt?
             were there any “flaws” in your data?
             were you fully convinced about your conclusions?
                                                                                          GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 63


Generic Mark Scheme for Task B and C

                                        Level 1                                              Level 2                                             Level 3

                    The candidate outlines a brief method to solve a   The candidate independently devises a method to        The candidate independently devises a
                    practical problem. (S)he makes a plan to devise    solve a practical problem which, with some changes     method to solve a practical problem,
                    some relevant data without necessarily             or elaboration, could be followed by another person.   described in a series of well ordered steps,
                    controlling variables.                             (S)he identifies the equipment needed for the task.    which would enable the investigation to be
                                                                                                                              carried out by another person.
 Devising Methods




                    Some equipment is identified for the task.         The candidate presents their work using English
                    Guidance may be required.                          (grammar and spelling) that is largely appropriate     The candidate presents their work logically
                                                                       and accurate. (S)he often uses scientific language     and using good English (spelling and
                    The candidate makes limited use of appropriate     and terminology appropriately.                         grammar) to a high standard to
                    English (spelling and grammar) and scientific                                                             communicate meaning clearly.
                    language.


                                          1-3                                                  4-6                                                 7-9

                                                                                                                                                Total Available Marks: 9


Zero marks to be awarded where there is insufficient evidence to achieve a mark at level 1.
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 64


Generic Mark Scheme for Task B and C

                                               Level 1                                Level 2                                  Level 3                                   Level 4
                                 The candidate uses procedures          The candidate uses procedures to      The candidate uses procedures to collect
                                 to collect data of low quality or of   collect mainly appropriate data of    data of high quality. The data is suitable
 Collecting and Recording Data




                                 limited value or relevance. The        reasonable quality. The quantity of   and relevant to their investigation. The
                                 quantity of data may be limited        data is adequate for purposes of      candidate collects a wide range of data
                                                                        investigation.                        for the investigation.

                                                 1                                       2-3                                      4-5
                                 The candidate partially records        The candidate records data or         The candidate independently devises          The candidate independently
                                 data or observations into a given      observations into a given template.   methods to record data. Their records of     devises their own format for
                                 template.                              Records are complete and              data are clear and largely error free.       recording results and accurately
                                                                        presented to reasonable standard.                                                  records data or observations to an
                                                                                                                                                           appropriate degree of precision.
                                                                                                                                                           Their data is recorded to a high
                                                                                                                                                           standard and is easy to follow. All
                                                                                                                                                           units correctly recorded.
                                                  1                                     2-3                                      4-5                                         6-7
                                                                                                                                                                    Total Available Marks: 12

Zero marks to be awarded where there is insufficient evidence to achieve a mark at level 1.
                                                                                                      GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 65


Generic Mark Scheme for Task B and C

                                      Level 1                              Level 2                                     Level 3                                    Level 4
                        The candidate carries out very      The candidate carries out some             The candidate carries out mainly suitable   The candidate carries out the
                        simple and limited processing of    appropriate processing of data.            and appropriate processing of data.         suitable and appropriate processing
                        data. A very limited attempt to     Some attempt to analyse and                The candidate makes an appropriate          of data, transforming data into useful
                        analyse and interpret data. (S)he   interpret data. (S)he gives a brief but    interpretation of the data using mainly     information.
                        gives a simple statement of         clear conclusion largely consistent        appropriate methods of analysis.
                        findings.                           with the data. (S)he identifies and        (S)he gives detailed conclusions largely    The candidate makes a detailed
                                                            explains some patterns within the          consistent with the evidence.               interpretation of data using suitable
                        The candidate makes limited use     data.                                                                                  methods of data analysis. All their
 Making Sense of Data




                        of appropriate English                                                         The candidate uses mainly appropriate       work can be easily followed. (S)he
                        (spelling/grammar) and scientific   There is some appropriate use of           and accurate English                        makes detailed conclusions
                        language.                           English (spelling/grammar) and             (spelling/grammar) and scientific           consistent with the evidence.
                                                            scientific language to                     language to communicate their               (S)he identifies and explains all the
                        The candidate demonstrates          communicate meaning.                       scientific understanding.                   patterns within the data.
                        limited ability to structure the
                        work in an appropriate way.         The candidate demonstrates some            The work is well structured and logically   The candidate uses an appropriate
                                                            ability to structure their work to         argued with relatively minor errors.        and accurate use of English
                                                            convey meaning.                                                                        (spelling/grammar) and scientific
                                                                                                                                                   language to communicate their
                                                                                                                                                   scientific understanding.

                                                                                                                                                   The work is logically argued and is
                                                                                                                                                   well structured.

                                        1-3                                  4-6                                          7-9                                      10-12
                                                                                                                                                           Total Available Marks: 12

Zero marks to be awarded where there is insufficient evidence to achieve a mark at level 1.
     GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 66


               Generic Mark Scheme for Task B and C

                                  Level 1                                           Level 2                                           Level 3

             The candidate gives a simple evaluation of the    The candidate gives a clear evaluation of their   The candidate gives a detailed evaluation of their
             investigation/ procedure.                         investigation/ procedure.                         investigation/procedure. They suggest
                                                                                                                 suitable/relevant improvements to their method.
Evaluating




                                     1                                                 2                                                3-4
             The candidate makes a limited assessment of the   The candidate makes an assessment of the          The candidate makes a detailed assessment of
             validity or quality of data.                      validity and quality of evidence.                 the validity and quality of data.

                                     1                                                 2                                                3-4
                                                                                                                                         Total Available Marks: 8

     Zero marks to be awarded where there is insufficient evidence to achieve a mark at level 1.
                    GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 67



Teacher Guidance
You are referred to section 5 of the specification which stipulates the conditions for
controlled assessment.

Further Guidance on Supervision and Time

Preparation for activity. It will be necessary to direct candidates to devise a method for
testing either:

   •   stretch – best behaviour or
   •   strength of the material – strongest.

Candidates are allowed to carry out research prior to devising the method. It is assumed
that a class session is set aside to introduce the activity and allow candidates to prepare
for the task. Learners will be able to complete research for the activity before they are
required to devise the method (see specification – Limited control for research). This
should be completed 1 week from giving the activity to the candidates.

Learners should ‘devise the procedure’ under informal supervision.

The practical activity should take about 1.5 hours.

Candidates should be allowed a maximum of 2 hours to complete the analysis,
interpretation and evaluation.

Candidates with specific learning difficulties can be given extra time as defined in
‘Access Arrangements, Reasonable Adjustments and Special Consideration – General
and Vocational Qualifications’.

Preparing learners for the activity

There are a number of investigations that candidates could carry out prior to carrying out
their controlled assessment. The following is deemed to be helpful:

   •   Testing the strength of different materials

Managing the tests and sharing data

Teachers are required to give data for step 3 of the task. This data can be data derived
from other members of the group or by the teacher's own investigation. This is to allow
candidates to make a judgement based upon the two properties tested. Teachers
should ensure that each candidate has sufficient data to enable them to process data
(e.g. to average readings). The data shared will be the raw data obtained from the
investigation. The candidate’s data must be clearly identifiable to the moderator. This
can be achieved by annotating the candidate’s work.

Health and Safety

Centres are reminded of the legal requirement to carry out a risk assessment before
allowing candidates to carry out practical work.
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 68


      Task Marking

      The work of each candidate should be assessed in each of the following fields:

      •    Communicating Science
      •    Devising Methods
      •    Collecting and Recording Data
      •    Making Sense of Data
      •    Evaluating.

      When assessing candidates the following points need to be kept in mind:

      1.      The bands are hierarchical, however, a "best fit" approach should be adopted,
              i.e. minor shortcomings at one level can be overcome by a candidate's clearly
              meeting the additional demands of a higher level.

      2.      Centres are required to annotate work to show which level is achieved in
              each field and to indicate the evidence for the achievement of the level and
              position within the level.

      3.      The marks for each of the fields should be entered into the table on the
              controlled assessment cover sheet and the authenticating declarations by the
              candidate and teacher/lecturer signed and dated.

      4.      A single mark for Task B out of 43 needs to be submitted.
                      GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 69



       GCSE Additional Applied Science: Controlled Assessment

Group C Task

Science and Food – Quality Control in Food Processing

Context of the Assessment

Quality control is important for any food-processing business. The quality of the supplies and
the quality of the final products all need to be controlled.
A food-processing company is adding a new pickle to its product range. A quality control
program needs to be set up for the process. Three important areas have been identified as
critical points for quality control:
•    the ripeness of the tomatoes and apples, and the crispness of the carrots and
     cucumbers
•    the strength of the vinegar
•    the keeping quality of the final pickle.
Your assignment is to devise quality control procedures for the strength of the vinegar and
use this method to test the suitability of four different vinegar batches.
The quality of the vinegar used to make the pickle is important. The colour and clarity can be
seen, but it is the acidity of the vinegar which inhibits the growth of micro-organisms and
creates a product that will keep well at room temperature. The acid in vinegar is ethanoic
acid.


What do you need to do?

1.       Write a standard procedure to monitor the quality of the vinegar.

         You will need to refer to the Candidate Information Sheet before you complete the
         standard procedure. You also need to be aware that a vinegar will be rejected for
         pickling if the concentration of the ethanoic acid is less than 6 g/100 cm3

2.       Show your method to your supervisor and wait for them to authorise your standard
         procedure before moving to the next stage of the investigation.

3.       Use your standard procedure to titrate your batch of vinegar (Batch A) which will be
         given to you by your supervisor.

4.       Use your data and that of three other batches, which will be given to you by your
         supervisor, to decide whether the different batches of vinegar are suitable for use in
         the pickling plant.

5.       You must now present and analyse all the data you have in a way which will allow
         you to decide whether the batches of vinegar are suitable for use.
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 70


6.    Make conclusions using the evidence you have collected. Remember the two
      problems that you are considering from the introduction.


7.    Now that you have gathered all your results and presented your conclusions it is time
      to “evaluate” – to make a decision as to how good your evidence really is.

      •   Evaluate the methods which have been used
      •   Evaluate the quality of the data.
                    GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 71


Candidate Information Sheet

       •   The amount of acid present in vinegar can be determined by titrating diluted
           vinegar against a standard solution of sodium hydroxide of concentration
           0.100 mol dm-3.
       •   The vinegar needs to be diluted by a factor of 10 before titrating by pipetting
           25.0 cm3 of vinegar into a volumetric flask and making it up to 250 cm3 with
           distilled water.


Calculation

   •   The concentration of the ethanoic acid (in g per 100 cm3) can be found by using the
       equation:
              concentration of sodium hydroxide x volume NaOH x 6
                                 volume acid


Deciding on the indicators

The indicator that you use will depend upon the type of titration you doing.


Type of titration             Indicator to use       Colour change at end point (Alkali in
                                                     burrette)
                                                     Phenolphthalein: Colourless to permanent
                              Phenolphthalein or
Strong acid – strong alkali                          pale pink
                              methyl orange
                                                     Methyl orange: Red to orange
                                                     Phenolphthalein: Colourless to permanent
Strong acid – weak alkali     Methyl orange          pale pink
                                                     Methyl orange: Red to orange
                                                     Phenolphthalein: Colourless to permanent
Weak acid – strong alkali     Phenolphthalein        pale pink



Strong acids: Hydrochloric acid, sulfuric acid

Weak acid: Ethanoic acid

Weak alkali: Ammonia

Strong alkali: Sodium hydroxide
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 72


Generic Mark Scheme for Task B and C

                                        Level 1                                              Level 2                                             Level 3

                    The candidate outlines a brief method to solve a   The candidate independently devises a method to        The candidate independently devises a
                    practical problem. (S)he makes a plan to devise    solve a practical problem which, with some changes     method to solve a practical problem,
                    some relevant data without necessarily             or elaboration, could be followed by another person.   described in a series of well ordered steps,
                    controlling variables.                             (S)he identifies the equipment needed for the task.    which would enable the investigation to be
                                                                                                                              carried out by another person.
 Devising Methods




                    Some equipment is identified for the task.         The candidate presents their work using English
                    Guidance may be required.                          (grammar and spelling) that is largely appropriate     The candidate presents their work logically
                                                                       and accurate. (S)he often uses scientific language     and using good English (spelling and
                    The candidate makes limited use of appropriate     and terminology appropriately.                         grammar) to a high standard to
                    English (spelling and grammar) and scientific                                                             communicate meaning clearly.
                    language.

                                          1-3                                                  4-6                                                 7-9

                                                                                                                                                Total Available Marks: 9


Zero marks to be awarded where there is insufficient evidence to achieve a mark at level 1.
                                                                                                              GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 73


Generic Mark Scheme for Task B and C

                                               Level 1                                Level 2                                   Level 3                                   Level 4
                                 The candidate uses procedures          The candidate uses procedures to       The candidate uses procedures to collect
                                 to collect data of low quality or of   collect mainly appropriate data of     data of high quality. The data is suitable
 Collecting and Recording Data




                                 limited value or relevance. The        reasonable quality. The quantity of    and relevant to their investigation. The
                                 quantity of data may be limited        data is adequate for purposes of       candidate collects a wide range of data
                                                                        investigation.                         for the investigation.

                                                 1                                       2-3                                       4-5
                                 The candidate partially records        The candidate records data or          The candidate independently devises          The candidate independently
                                 data or observations into a given      observations into a given template.    methods to record data. Their records of     devises their own format for
                                 template.                              Records are complete and               data are clear and largely error free.       recording results and accurately
                                                                        presented to reasonable standard.                                                   records data or observations to an
                                                                                                                                                            appropriate degree of precision.
                                                                                                                                                            Their data is recorded to a high
                                                                                                                                                            standard and is easy to follow. All
                                                                                                                                                            units correctly recorded.
                                                  1                                     2-3                                       4-5                                         6-7
                                                                                                                                                                     Total Available Marks: 12

Zero marks to be awarded where there is insufficient evidence to achieve a mark at level 1.
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 74


Generic Mark Scheme for Task B and C

                                      Level 1                              Level 2                                    Level 3                                    Level 4
                        The candidate carries out very      The candidate carries out some            The candidate carries out mainly suitable   The candidate carries out the
                        simple and limited processing of    appropriate processing of data.           and appropriate processing of data.         suitable and appropriate processing
                        data. A very limited attempt to     Some attempt to analyse and               The candidate makes an appropriate          of data, transforming data into useful
                        analyse and interpret data. (S)he   interpret data. (S)he gives a brief but   interpretation of the data using mainly     information.
                        gives a simple statement of         clear conclusion largely consistent       appropriate methods of analysis.
                        findings.                           with the data. (S)he identifies and       (S)he gives detailed conclusions largely    The candidate makes a detailed
                                                            explains some patterns within the         consistent with the evidence.               interpretation of data using suitable
                        The candidate makes limited use     data.                                                                                 methods of data analysis. All their
 Making Sense of Data




                        of appropriate English                                                        The candidate uses mainly appropriate       work can be easily followed. (S)he
                        (spelling/grammar) and scientific   There is some appropriate use of          and accurate English                        makes detailed conclusions
                        language.                           English (spelling/grammar) and            (spelling/grammar) and scientific           consistent with the evidence.
                                                            scientific language to                    language to communicate their               (S)he identifies and explains all the
                        The candidate demonstrates          communicate meaning.                      scientific understanding.                   patterns within the data.
                        limited ability to structure the
                        work in an appropriate way.         The candidate demonstrates some           The work is well structured and logically   The candidate uses an appropriate
                                                            ability to structure their work to        argued with relatively minor errors.        and accurate use of English
                                                            convey meaning.                                                                       (spelling/grammar) and scientific
                                                                                                                                                  language to communicate their
                                                                                                                                                  scientific understanding.

                                                                                                                                                  The work is logically argued and is
                                                                                                                                                  well structured.

                                        1-3                                  4-6                                         7-9                                      10-12
                                                                                                                                                          Total Available Marks: 12

Zero marks to be awarded where there is insufficient evidence to achieve a mark at level 1.
                                                                                   GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 75


               Generic Mark Scheme for Task B and C

                                  Level 1                                           Level 2                                           Level 3

             The candidate gives a simple evaluation of the    The candidate gives a clear evaluation of their   The candidate gives a detailed evaluation of their
             investigation/ procedure.                         investigation/ procedure.                         investigation/procedure. They suggest
                                                                                                                 suitable/relevant improvements to their method.
Evaluating




                                     1                                                 2                                                3-4
             The candidate makes a limited assessment of the   The candidate makes an assessment of the          The candidate makes a detailed assessment of
             validity or quality of data.                      validity and quality of evidence.                 the validity and quality of data.

                                     1                                                 2                                                3-4
                                                                                                                                         Total Available Marks: 8

     Zero marks to be awarded where there is insufficient evidence to achieve a mark at level 1.
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 76


Teacher Guidance

You are referred to section 5 of the specification which stipulates the conditions for
controlled assessment.

Further Guidance on Supervision and Time

Preparation for activity. Candidates are allowed to carry out research prior to devising
the method. It is assumed that a class session is set aside to introduce the activity and
allow candidates to prepare for the task. Learners will be able to complete research for
the activity before they are required to devise the method (see specification – limited
control for research). This should be completed in 1 week from the giving the activity.
Learners should ‘devise the procedure’ under informal supervision.

The practical activity should take about 1.5 hours.

Candidates should be allowed 2 hours to complete the analysis, interpretation and
evaluation.

Candidates with specific learning difficulties can be given extra time as defined in
‘Access Arrangements, Reasonable Adjustments and Special Consideration – General
and Vocational Qualifications’.

Preparing learners for the activity

Candidates should have had opportunity of writing standard procedures and carrying out
simple titrations prior to this investigation.

Managing the tests and sharing data

Teachers are required to give candidates additional data to candidates when they start
their analysis of data. This information can be found on the page ‘Information from three
vinegar batches’. This page may be photocopied and given to students.

Health and Safety

Centres are reminded of the legal requirement to carry out a risk assessment before
allowing candidates to carry out practical work.

Task Marking

The work of each candidate should be assessed in each of the following fields:

•    Communicating Science
•    Devising Methods
•    Collecting and Recording Data
•    Making Sense of Data
•    Evaluating.

When assessing candidates the following points need to be kept in mind:

1.      The bands are hierarchical, however, a "best fit" approach should be adopted, i.e.
        minor shortcomings at one level can be overcome by a candidate's clearly meeting
        the additional demands of a higher level.
                 GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 77


2.   Centres are required to annotate work to show which level is achieved in each field
     and to indicate the evidence for the achievement of the level and position within the
     level.

3.   The marks for each of the fields should be entered into the table on the controlled
     assessment cover sheet and the authenticating declarations by the candidate and
     teacher/lecturer signed and dated.

4.   A single mark for Task C out of 43 needs to be submitted.
GCSE in ADDITIONAL APPLIED SCIENCE Specimen Assessment Materials 78


Information from three vinegar batches

These are the results obtained for three other batches of vinegar. The results are taken from
two other analysts. R L Blackwood, an experienced member of staff, and A. W. Smith, a new
member to the team.


Batch B taken by R. L. Blackwood


Reading                      Rough                   1               2              3
Volumes cm3                   21.30                 21.00           21.20        21.10



Batch C taken by R. L. Blackwood

Reading                      Rough                   1               2              3
Volumes cm3                   26.40                 26.10           26.20        26.15



Batch D taken by A. W. Smith

Reading                   Rough                1             2              3           4
Volumes cm3               24.20             25.00           25.80        24.60     24.00




GCSE in Additional Applied Science SAMs - 2011/ED
23/2/11

				
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