Science 7 · Unit 3: Forces and energy · Cambridge Lower Secondary Science Stage 7

Questions

1. 1. Which form of energy is this? Energy stored in hot objects.

   • light
   • kinetic
   • thermal
   • chemical
   Check

2. 2. Which form of energy is this? Energy transferred by a current in wires.

   • elastic
   • thermal
   • electrical
   • sound
   Check

3. 3. Which form of energy is this? Energy stored in fuel.

   • chemical
   • gravitational potential
   • thermal
   • kinetic
   Check

4. 4. Which form of energy is this? Energy in objects that are lifted higher.

   • gravitational potential
   • elastic
   • kinetic
   • chemical
   Check

5. 5. Which form of energy is this? Energy that we can see.

   • electrical
   • light
   • sound
   • thermal
   Check

6. 6. Which form of energy is this? Energy stored in an object that has changed shape.

   • kinetic
   • chemical
   • thermal
   • elastic
   Check

7. 7. Which form of energy is this? Energy of moving objects.

   • elastic
   • chemical
   • kinetic
   • gravitational potential
   Check

8. 8. Which form of energy is this? Energy transferred from vibrations.

   • chemical
   • sound
   • electrical
   • light
   Check

9. 9. Food is a store of which energy?

   • thermal
   • chemical
   • kinetic
   • elastic
   Check

10. 10. A book is lifted up onto a shelf. Which energy store increases?

    • gravitational potential
    • kinetic
    • elastic
    • chemical
    Check

11. 11. Which two forms of energy does the Sun transfer to Earth?

    • chemical and sound
    • sound and light
    • light and thermal
    • kinetic and elastic
    Check

12. 12. A musical instrument transfers which form of energy to our ears?

    • light
    • thermal
    • elastic
    • sound
    Check

13. 13. A burning piece of wood falls out of a fire to the ground. Which energy does it transfer while falling?

    • thermal and light
    • gravitational potential and chemical
    • elastic and electrical
    • only kinetic
    Check

14. 14. Which energy is still stored in the burning wood as it falls?

    • chemical
    • elastic
    • sound
    • electrical
    Check

15. 15. Water falls faster and faster down a waterfall. Which energy does it gain?

    • kinetic
    • gravitational potential
    • elastic
    • chemical
    Check

16. 16. Joule said: 'I think the water at the bottom of the waterfall will be warmer than at the top.' What is this?

    • a prediction
    • an observation
    • a measurement
    • a conclusion
    Check

17. 17. Joule and Kelvin could not finish measuring the temperature at the top and bottom of a waterfall over 200 m high. What is one reason it was too difficult?

    • The temperature difference was very small, too small to measure with their thermometers.
    • The water was boiling at the bottom.
    • Thermometers had not been invented.
    • The water at the bottom was colder.
    Check

18. 18. What is another reason Joule and Kelvin's waterfall investigation was too difficult?

    • The water did not move.
    • The waterfall was too small to measure.
    • They did not know what a prediction was.
    • The waterfall was over 200 m high, so it was hard and dangerous to measure the water at the top and at the bottom.
    Check