Science 5 · Unit 2: Sound · Cambridge Primary Science Stage 5

Questions

1. 1. How are sounds made?

   • by things vibrating
   • by things staying still
   • by things getting cold
   • by light shining
   Check

2. 2. What is a vibration?

   • a kind of light
   • a change in colour
   • a very quick movement back and forth
   • a slow movement in one direction
   Check

3. 3. Why do the rice grains jump when you tap the jar?

   • Air blows them.
   • Vibrations travel through the jar and plastic wrap to the rice.
   • The jar gets hot.
   • The rice is alive.
   Check

4. 4. You tap the jar harder. What happens to the rice grains?

   • They stop moving.
   • They move more.
   • They move less.
   • They change colour.
   Check

5. 5. Can sound travel through solids, liquids and gases?

   • Yes
   • No
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6. 6. Through which kind of material does sound travel best?

   • gases
   • solids
   • liquids
   • a vacuum
   Check

7. 7. Why does sound travel best through solids?

   • Their particles are far apart.
   • Their particles are packed close together.
   • Solids make their own sound.
   • Solids are always hot.
   Check

8. 8. In a fair test, what is the control variable?

   • what you predict
   • what you keep the same
   • what you change
   • what you measure
   Check

9. 9. In a fair test, what is the independent variable?

   • what you measure
   • what you keep the same
   • the result
   • what you change
   Check

10. 10. In a fair test, what is the dependent variable?

    • what you measure
    • what you keep the same
    • the equipment
    • what you change
    Check

11. 11. You test how loud a ticking clock sounds through wood, water and air. What is the independent variable?

    • the clock
    • the loudness of the sound
    • the material
    • the person listening
    Check

12. 12. In the same test, what is the dependent variable?

    • the material
    • the table
    • the clock
    • the loudness of the sound
    Check

13. 13. Why should you repeat your test on each material?

    • to get more accurate, reliable results
    • to finish faster
    • to use more materials
    • to make the clock louder
    Check

14. 14. Zara put the clock 0 cm from plastic but 5 cm from cardboard. Why are her results not accurate?

    • The distance was not kept the same.
    • Cardboard is not a material.
    • The clock was too quiet.
    • She used too many materials.
    Check

15. 15. As sound travels further from its source, it becomes ...

    • stronger
    • higher
    • fainter
    • lower
    Check

16. 16. How can you see that guitar strings make sound?

    • You can see them vibrate when you pluck them.
    • They light up.
    • They get longer.
    • They change colour.
    Check