Science 8 · Unit 9: Magnetism · Cambridge Lower Secondary Science Stage 8

Questions

1. 1. What is a magnetic field?

   • the north pole of a magnet
   • a field of grass near a magnet
   • the region around a magnet where it exerts a magnetic force
   • a type of electric circuit
   Check

2. 2. In which direction do magnetic field lines point?

   • from the north pole to the south pole
   • straight up
   • in circles around the middle only
   • from south to north
   Check

3. 3. Where is the magnetic field of a bar magnet strongest?

   • far away from the magnet
   • in the middle of the magnet
   • it's the same everywhere
   • near the poles
   Check

4. 4. How do field-line diagrams show where a field is strong?

   • The lines are further apart.
   • The lines are coloured red.
   • The lines are closer together.
   • There are no lines.
   Check

5. 5. How can a compass detect a magnetic field?

   • The needle lines up along the field lines.
   • It spins continuously.
   • It makes a sound.
   • It gets hot.
   Check

6. 6. How can iron filings show a magnetic field?

   • Sprinkle them on paper over the magnet; they line up along the field lines.
   • Heat them until they glow.
   • Mix them with water.
   • Put them inside the magnet.
   Check

7. 7. Two poles' field lines between them point in opposite directions. Do the poles attract or repel?

   • attract
   • repel
   Check

8. 8. Two poles' field lines between them point the same way, joining across the gap. Attract or repel?

   • attract
   • repel
   Check

9. 9. What happens to the strength of a magnetic field as you move away from a magnet?

   • It gets weaker.
   • It gets stronger.
   • It stays the same.
   • It reverses.
   Check

10. 10. Between two south poles, what does the field pattern look like?

    • Lines join straight across.
    • Lines curve away from each other with a gap in the middle.
    • There is no field at all.
    • Lines form a circle around one magnet only.
    Check

11. 11. Which materials are affected by a magnetic field?

    • plastics and wood
    • glass and paper
    • magnetic materials like iron, steel, nickel and cobalt
    • all metals
    Check

12. 12. Can you see a magnetic field directly?

    • No, but you can show it with iron filings or a compass.
    • Only at night.
    • Yes, it is red.
    • Yes, it glows.
    Check

13. 13. Which end of a compass needle points to a magnet's south pole?

    • neither end
    • the north end
    • the south end
    • both ends
    Check

14. 14. The magnetic field of magnet A extends further than that of magnet B. What can you conclude?

    • Magnet A has no poles.
    • Magnet B is stronger.
    • They are equally strong.
    • Magnet A is stronger.
    Check

15. 15. Which rule do magnetic field lines always follow?

    • They only go from one north pole to another.
    • They never touch or cross each other.
    • They always form straight lines.
    • They point from south to north.
    Check