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1. What do we call end of a magnet? (lesson8a)
2. Which of the following materials are magnetic? Copper, paper, iron, glass, steel. (8a)
3. How can you make 2 magnets repel each other? (8a)
4. How can you make an electromagnet? (8b)
5. Name 5 uses of electromagnets. (8b)
6. What things do you need to find the magnetic field around a magnet? (8b)
7. For an electric current to flow there must be a complete ------- with no ---- in it. (8c)
8. What do we call materials which a) let electricity pass through them, b) do not let electricity pass through them.?
9. Draw 2 circuits to show the difference between series and parallel circuits. Use one cell and 2 bulbs in each circuit. (8d)
10. We believe that tiny particles pass through a wire when a current flows. What are these tiny particles called? (8d)]
11. What happens to a thin piece of wire when electricity is passed through it? (8e)
12. What do we use to measure the size of an electric current? (8e)
13. What are the units used to measure an electric current? (8e)
14. What do we call the safety device used plugs? How does it work? (8e)
15. What do we use to measure the size of the 'push' of a battery? (8f)

ANSWERS

1. The north and south poles.
2. Iron and steel.
3. Put two north or two south poles together.
4. Connect a coil of wire to a battery and pass electricity through it.
5. In scrap yards, electric motors, door bells, TV sets and loudspeakers.
6. A plotting compass or iron fillings.
7. Circuit, gaps.
8. a) Conductors. b) Insulators.
9. See your textbook or your exercise book.
10. Electrons.
11. It heats up.
12. An ammeter.
13. Amperes (amps or A)
14. A fuse. It breaks (melts) when too much current flows through it. This breaks the circuit.
15. A voltmeter.