Science at key stage 3 (Year 8)
Unit 8J: Magnets and electromagnets
Section 4: b. Can magnetism be stopped? Can magnets be made?
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Objectives |
| Children should learn: |
- that magnetic materials can be made into magnets by stroking them with the pole of a magnet
- about the reasons for repeating observations
- to use observations to draw conclusions
- how discussion helps clarify ideas
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Activities |
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Outcomes |
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Children: |
- Establish that those materials which shield magnetism can be made into magnets,
eg pupils make 'soft' iron nails into magnets using the stroking technique and test the magnet's effectiveness. This could include a competitive aspect with a prize for the strongest magnet. Pupils could discuss and agree how the magnets' strength is to be tested,
eg number of paper clips picked up, numbers of trials to be carried out.
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- describe how to magnetise a magnetic material
- design and use a method for measuring magnetic strength
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Points to note |
- Pupils may have tested the strength of permanent magnets in key stage 2, so concentrate on the criteria which enable good comparisons to be made,
eg sensitivity (Are paper clips too big?)
- Extension: the domain theory of magnetism is not included at this point, but a simple version could be given to some pupils.
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This unit is divided into sections. Each section contains a sequence of
activities with related objectives and outcomes. You can view this unit by
moving through the sections or print/download the whole unit.
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