Graphs in Junior Science

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					JSSS                                                              Teacher support material




Graphs in Junior Science
The use of graphs is one of the clearest differences between junior and primary
science

References to graphs in the junior syllabus
Skills

The student will develop skills associated with

    numeracy, and the manipulation and interpretation of data in a variety of forms,
     including the use of symbols, charts and graphs
    graphing or tabulating (using recorded or supplied data)

Practical activities in science

The revised syllabus emphasises a practical experience of science for the stu dent. The
syllabus presentation does not imply any particular method or sequence of teaching
science, although it should follow a logical and coherent approach. In the teaching
and learning, appropriate links should be made between the three syllabus sections. A
wide range of teaching approaches may be used, including the use of datalogging
where appropriate.


The following is an indicative list of graphs implicit in the syllabus


Biology

Topic                Objective Year   Description                   Datalogging(recn)
1A1                  OB5       3      Temperature against time      Possible
                                      as heat energy released
                                      from food
1A5                  OB16      1      Pulse rate against time       Not exclusively
                                      after exercise
1C7                  OB59      1      Distribution of named         No
                                      organisms



Chemistry

Topic          Objective Year      Description                      Datalogging(recn)
2A7            OC15      1?        Effect of temperature on         Not exclusively
JSSS                                                                    Teacher support material


                                      solubility
2B5             OC38        23        pH change in neutralisation         Yes
2C3             OC46        1         Dissolved oxygen with time          Yes
                                      during rusting


Physics
Topic              Objective Year Description                             Datalogging(recn)
3A1                OP1       1    Measure Temperature vs.                 Possible
Measurement                       time for a change
                             2    Measure distance, time and              Yes but not
                                  so speed, velocity and                  exclusively
                                  acceleration

3A3 Force and      OP7           1      Measure force on and              Not exclusively
moments                                 length of extensible object
                                 1      Measure pull force and            Not exclusively
                                        weight of object
                                        overcoming friction
                                        (roughness/lubrication)

3A4                OP11          2      Measure pressure and              Yes
                                        depth in a liquid

3B1                OP23          1      Measure expansion of              No
                                        liquid when heated and
                                        contraction when cooled
3B1                OP25          1      Measure temperature of            Possible
                   OP28          1      solids and liquids and
                                        determine melting and
                                        boiling point for ice / water
3B1                OP29          1      Cooling curve and latent          Yes but not
                                        heat                              exclusively
3B2                OP31          23     Heating by conduction,            Possible
                                        convection, radiation
3B2                OP31          23     Conductors and insulators         Possible
3B5                OP41          23     Sound reflects and speed of       Yes
                   OP43                 sound < speed of light: use
                                        of speed of sound
                                        measurement? Amplitude
                                        vs. time
3C3                OP49          1      Measure current, length           Not recommended
3C3                OP50          23     Measure voltage                   Possible



Number of Graphs (approx)
biology 3, chemistry 3, physics 14
Of these approximately half (12 from 20 in this list) are in first year topics
JSSS                                                              Teacher support material




Development of skills

      For students, science may be their first experience of making and interpreting
       graphs, certainly of line graphs
      Many graphs are in topics suitable for first year


Graphs can be produced using many different methods and approaches.
      Simple manual plotting using specific graph paper – easily produced as part of
       resource materials.
      Manual plotting on normal graph paper.
      Use of calculator to make graph and sketch or transfer to Graphical
       Analysis/print.
      Use of Graphical Analysis to make graph and print.
      Use of locked Excel sheets to make graph and print.
      Use of any electronic method to plot the line and assist interpretation of the
       graph.

				
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posted:4/7/2010
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