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Atoms and elements

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					      Atoms and elements




Sunday, 25 September
2011                       1
                                     Index
   Lesson 1: An introduction to elements, compounds and reactions.
   Homework task 1
   Lesson 2: Elements ~ the building blocks of matter.
   Homework task 2
   Lesson 3: Let’s find out more about an element.
   Homework task 3
   Lesson 4: There are only 100 different elements, how do we get all the other
    materials?
   Homework task 5
   Lesson 5: What’s the difference between a compound and a mixture?
   Homework task 5
   Lesson 6: Using reactions to make new compounds.
   Lesson 7: Separating a mixture
   Lesson 8: Assessment



Sunday, 25 September
2011                                                                               2
           An introduction to elements, compounds and reactions

                          LESSON 1

Sunday, 25 September
2011                                                              3
                       Equipment
Equipment for 8 groups
 Transformers
 Croc leads
 Spatulas (2 per group)
 Copper sulphate solution (liquid)
 Test tube racks
 Test tubes (2 per group)
 Vinegar
 Baking powder




Sunday, 25 September
2011                                  4
                   Lesson objectives
 To learn how chemical reactions make
   something new and different.




Sunday, 25 September
2011                                     5
            Making something new
A   reaction between vinegar and baking
   powder.




Sunday, 25 September
2011                                       6
  Electrolysis of copper sulphate
Links:
BBC Bitesize




Sunday, 25 September
2011                                7
                       Lesson 2
               The building blocks of matter




Sunday, 25 September
2011                                           8
                       Equipment
   CD ROM: Reactions between alkali metals and
    water
   DVD: Curriculum bites ~ Wan2Tlk Science
   Materials kit
   A4 copies of periodic table
   Various elements to show (whatever is possible
    from this list: copper, sulphur, carbon, oxygen in
    gas bottle, chrome & tin)


Sunday, 25 September
2011                                                     9
                       Getting started...
 Video: Reactions between alkali metals
   and water.




Sunday, 25 September
2011                                        10
                       Objective
Begin to get the idea that
 everything is made from basic
 materials called elements.




Sunday, 25 September
2011                               11
                         Input
 See this again: Reactions with alkali metals
  (CD ROM)
 Using whiteboards in pairs:
        Can you remember the names of the metals?
        After the reaction, what do YOU think was left?
 See        some elements and discuss.



Sunday, 25 September
2011                                                  12
                       Starter
 Everything  we know about is made of
  basic substances called elements.
 Elements are substances that are not
  joined with something else to make
  something different.
 Work in a group to make a list on a
  whiteboard of substances you think might
  be elements.
Sunday, 25 September
2011                                         13
                                    1. Each group to suggest one
                                       element from their list. Do we
                                       agree?
                                    2. Video input:
Atoms, molecules

                                        • Wan2Tlk Science/ Chemistry/
                   PERIODIC TABLE         Atoms
                                        • Wan2Tlk Science/ Molecules
and elements.


                                          and elements
                                    3. Let’s have a look at the
                                        INTERACTIVE PERIODIC
                                        TABLE




 Sunday, 25 September
 2011                                                              14
                              Links
 Sheffield            Hallam University




Sunday, 25 September
2011                                       15
   Activity: Elements and non-elements

 Work   in a group. Use a materials kit.
 Which materials in this kit are elements?
 Divide the materials into two groups.
 List or draw in your book (elements),
  (non-elements).

                       ELEMENTS   NON ELEMENTS



Sunday, 25 September
2011                                             16
                       And finally
 Work in pairs with a whiteboard.
 Copy and complete the following
  sentence:
        Elements are substances that...




Sunday, 25 September
2011                                       17
     Lesson 3: Let’s find out
     more about an element
                   Research & presentation




Sunday, 25 September
2011                                         18
                       Equipment
 Colour photographs         A short length of
  of elements.                magnesium ribbon
 Books about                Hoffman Voltameter
  materials and
  chemistry.
 A4 copies of the
  periodic table (quality
  prints)
 Glue, scissors &
  paper.
Sunday, 25 September
2011                                               19
                       Starter...
 What’s water made
  from?
 Can we split it up into
  hydrogen and
  oxygen?
 Demonstration of
  Hoffman voltameter.



Sunday, 25 September
2011                                20
                       Objective
 To  find out more about the properties of
   one element.




Sunday, 25 September
2011                                          21
To find out more about the properties of one element.


            Important scientific words.
                 What do you think they mean?
     element
     raw materials
     state at room temperature
     symbol




    Sunday, 25 September
    2011                                                22
To find out more about the properties of one element.


             What your group will do...
     ...youare going to make a presentation
      about one element.
     This could be:
            A wall display using cut-outs, photographs
             and diagrams.
            A PowerPoint presentation.
            Something else.
     DEADLINE:               by ....
    Sunday, 25 September
    2011                                                  23
        Research questions you might
                   ask...
   What    does this element look like?
   What uses does it have to us?
   What is its state at room temperature?
   What is its symbol?
   Is it a metal or a non-metal?
   Where is it on the periodic table?
   Anything else?
                            To find out more about the properties of one element.
Sunday, 25 September 2011                                                  24
To find out more about the properties of
one element.




                           Presentations
               Each group to present their work
               and clearly state what they found
                              out.

    Sunday, 25 September
    2011                                           25
To find out more about the properties of one element.


                           True or false?
                                                        TRUE   FALSE
    There are more non-elements than elements
    An apple is an element
    Very few elements are liquids at room
    temperature
    All gases are elements
    Water is an element: it is made of hydrogen and
    oxygen atoms
    Calcium is a metal




    Sunday, 25 September
    2011                                                               26
                       Lesson 4
          There are only 100 different
          elements, how do we get all the
          other materials?

Sunday, 25 September
2011                                        27
                       Equipment
 Worksheet:   ‘Lesson 4, worksheet 1’
 Daydream interactive whiteboard charts.
  CD ROM
 Copies of the periodic table
 Homework sheet
 Iron filings
 100 cm3 beakers (one per pair)
 Test tubes (one per pair)
Sunday, 25 September
2011                                        28
                       Getting started




Sunday, 25 September
2011                                     29
                Elements & symbols
   Do you know what       C
    these elements are?    H
    Work in pairs on       Fe
    whiteboards.           O
                           He
                           Cu
                           Pb
                           Ca
                           Zn
                           Ag

Sunday, 25 September
2011                                 30
                       Objectives
 New  materials are formed when atoms join
  together.
 Discover what compounds are.




Sunday, 25 September
2011                                      31
New materials are formed when atoms join together.
Discover what compounds are.


                            Introduction

     Daydream   interactive whiteboard
       charts. CD ROM: / materials & their
       properties / periodic table




    Sunday, 25 September
    2011                                             32
New materials are formed when atoms join together.
Discover what compounds are.

                           A challenge...
     Part 1: Work in pairs.
     All materials consist of elements.
      Sometimes materials are pure. Sometimes
      materials are made of more than one
      element combined.
     Use the worksheet to decide what each of
      the materials is made from.
     Link to worksheet

    Sunday, 25 September
    2011                                             33
New materials are formed when atoms join together.
Discover what compounds are.

                                Answers
       Carbon dioxide        Carbon and oxygen
       Iron oxide (rust)     Iron and oxygen
       Copper Sulphate       Copper, sulphur and oxygen
       Table salt            Sodium and chlorine
       Chlorine              Just chlorine ~ it’s an element
       Gold                  Jut gold ~ it’s an element
       Water                 Hydrogen and oxygen
       Copper oxide          Copper and oxygen
       Hydrocarbons          Hydrogen, oxygen and carbon
       Carbohydrates         Carbon, hydrogen and oxygen

    Score out of ten please
    Sunday, 25 September
    2011                                                        34
New materials are formed when atoms join together.
Discover what compounds are.



                             Video input
    BBC CLASS CLIPS 1: Atoms & elements
    1. Art. Why is air not an element?
    2. Wan2TlkScience. What can you say
       about all the atoms in an element?
    3. Amazing materials. What are the
       properties and uses of gold?

    Sunday, 25 September
    2011                                             35
Sunday, 25 September 2011



                            Challenge 2
      Part  2 (on the worksheet): Work in a
       different pair.
      Work out the chemical symbols or
       formulae for the following:




New materials are formed when atoms join together.
                                                     36
Discover what compounds are.
New materials are formed when atoms join together.
Discover what compounds are.

                                Answers

    Carbon dioxide                      CO2

    Iron oxide                          Fe203

    Iron sulphide                       FeS

    Copper Sulphate                     CuSO4

    Table salt                          NaCl

    Chlorine                            Cl

    Gold                                Au

    Water                               H20
                                                     Scores
                                                     out of 9
    Sunday, 25 September
    2011                                                        37
New materials are formed when atoms join together.
Discover what compounds are.

                           Some basics
       Elements are made of one type of particle. All
        the atoms are the same.
       There are about 100 different elements.
       Compounds are materials that are made of one
        or more different elements combined.
       The elements in compounds are chemically
        combined. A compound is completely different to
        the elements it is made from.
       Your task is to write everything you know about
        elements and compounds.
    Sunday, 25 September
    2011                                             38
                Task and homework
 Your task is to write everything you know
  about elements and compounds.
 Work in pairs ~ draft on whiteboards.
 Transfer to exercise books and complete
  at home.
 Don’t forget to revise section 6 of the
  Revision Guide.

Sunday, 25 September
2011                                          39
                       Lesson 5
            What’s the difference between a
              compound and a mixture?


Sunday, 25 September
2011                                          40
                            Equipment
For demonstration
        DVD: BBC class clips 1
        Magnesium ribbon
        Matches
For students in groups
        Chromatography: white blotting paper, berol felt pens, paper clips, large
         glass beakers (500 cm3)
        Filtering: filter paper, funnels, calcium carbonate (chalk) powder
        Evaporation: Bunsen burners, burning tins, tripods, salt, 100 cm³




Sunday, 25 September
2011                                                                            41
                       Objectives
 What’s the difference between a mixture
  and a compound?
 Can you use words and diagrams to
  explain?




Sunday, 25 September
2011                                        42
                       Getting started
 Check what’s happened in your iron filings
  experiment
 Demonstration of burning magnesium




Sunday, 25 September
2011                                       43
                         Follow up
 Explaining           the products of combustion.




Sunday, 25 September
2011                                                 44
                       Video input
 BBC     CLASS CLIPS 1 / Compounds and
     mixtures /
1. Elements and compounds. What is the main
   difference between an element and a mixture?
2. Elements and compounds. What are the
   elements formed in these two experiments?
3. Elements and compounds. What do we call
   atoms when they join together?

Sunday, 25 September
2011                                              45
              What is a compound?
 Ideas on whiteboards.
 Class discussion.




Sunday, 25 September
2011                                46
 Let’s investigate some mixtures
 Chromatography
        Can we separate the dyes in the ink?
 Filtering
        Can we separate the chalk from the water?
 Evaporation
        Can we separate the salt from the water?
         are easily separated.
 Mixtures
   Compounds are not!
Sunday, 25 September
2011                                                 47
                Answers that explain
 Today,   we looked at the difference
  between compounds and mixtures.
 Your suggestions please.
 Draft some writing to explain the difference
  between a mixture and a compound. Work
  directly in your exercise book.
 Homework: Complete your explanation.


Sunday, 25 September
2011                                        48
                       Lesson 6
            Moving elements around: Using
                reactions to make new
                     compounds.

Sunday, 25 September
2011                                        49
                                 Equipment
For demonstration
        copper oxide
        dilute sulphuric acid
        magnesium ribbon
        matches
        Candle
For students
        Candles (one per group)
        Tall glass jars (gas jars or measuring cylinders)
        Large glass beakers or water baths




Sunday, 25 September
2011                                                         50
               Objectives
 Learn more about how substances react to
  make new substances.
 Prove that burning is a reaction that uses
  a gas from the air.

For example:
 Sulphuric acid reacts with copper oxide to
  make…
Learn more about how substances react to make new substances.
Prove that burning is a reaction that uses a gas from the air.


                           Demonstrations
     Copper  oxide and dilute sulphuric acid.
     Oxidising magnesium.
     Burning a candle to change water level.
     Demo first, then you can try it.
     Oxidising iron to change water level.
     Demo first, then you can try it.



    Sunday, 25 September
    2011                                                         52
                           Plenary
   Reporting back in groups
   Group 1: What was the blue stuff in the conical flask called?
   Group 2: Why did the copper oxide and sulphuric acid turn blue?
   Group 3: What was the white powder that was left after the
    magnesium burned?
   Group 4: Why was there a lot of white powder left after the
    magnesium burned?
   Group 5: What gas was used from the air when the candle burned
    and what is its chemical formula?
   Group 6: Why did the water level rise when the candle was burning?
   Group 7: What new substance is formed when iron rusts?
   Group : Why do we expect the water level to rise when the iron
    rusts?
Sunday, 25 September
2011                                                                53
                         Lesson 7
                       Separating a mixture




Sunday, 25 September
2011                                          54
                             Equipment
For demonstration               For students to use in groups
 Copper sulphate solution      Dry sand
 Bunsen burner                 Electronic scales
 Tripod                        Dry table salt
 Burning dish                  Bunsen burners
 matches                       Burning tins (not too rusty)
                                Magnets
                                Eye protection
                                Measuring cylinders
                                Filter paper




Sunday, 25 September
2011                                                            55
                       Getting started
 Demonstration.
 Can  I separate the blue copper sulphate
   from the water?




Sunday, 25 September
2011                                         56
                       Practical
 Challenge:    Separating a mixture of sand,
   salt & iron filings.




Sunday, 25 September
2011                                            57
                       Plenary
 Allgroups to prepare feedback.
 What did you do at each stage of the
  process?
 Why did you do that at each stage?




Sunday, 25 September
2011                                     58
                       Assessment



Sunday, 25 September
2011                                59

				
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