- Ask pupils to recall whether magnetism will act through any materials, using evidence they have from everyday life,
e
g fridge magnets, games such as magnetic football.
- Ask pupils to devise a test to see which materials allow magnetism to act through them,
eg when a thread is attached to paper clip and taped to a bench, the paper clip will 'hover' below a magnet and fall when a sheet of magnetic material is inserted between it and the magnet. Ask pupils to suggest what the materials have in common to prevent the magnet working.
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- describe how they found out that magnetic materials block the action of magnetic fields
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