Science 5 · Unit 3: States and properties of matter · Cambridge Primary Science Stage 5

Questions

1. 1. What is evaporation?

   • a liquid changing into a gas at its surface
   • a solid changing into a liquid
   • a gas changing into a liquid
   • a liquid changing into a solid
   Check

2. 2. Why does evaporation happen?

   • Particles join together.
   • The liquid is pushed away.
   • Particles lose heat and sink.
   • Particles gain heat and escape from the surface.
   Check

3. 3. Two glasses of water are left for two days, one warm and one cool. Which loses more water?

   • the warm one
   • the cool one
   Check

4. 4. Why does washing dry quicker on a hot day?

   • Clothes absorb less water.
   • Water condenses faster.
   • Water evaporates faster when it is warm.
   • Hot days are windless.
   Check

5. 5. What is condensation?

   • a liquid turning into a gas
   • a liquid freezing
   • a solid melting
   • a gas cooling and turning into a liquid
   Check

6. 6. You breathe on a cold mirror. Why does it get misty?

   • The mirror makes water.
   • Water vapour in your breath condenses on the cold mirror.
   • The mirror melts.
   • Your breath is smoke.
   Check

7. 7. Why is condensation the reverse of evaporation?

   • Both turn solids to liquids.
   • They are the same process.
   • Evaporation turns liquid to gas; condensation turns gas back to liquid.
   • Condensation makes gases hotter.
   Check

8. 8. What happens to gas particles when they condense?

   • They get hotter.
   • They gain energy and spread out.
   • They vanish.
   • They lose energy, slow down and move closer together.
   Check

9. 9. Drops form inside the lid of Zara's drink bottle on a windowsill. What process made them?

   • condensation
   • freezing
   • boiling
   • melting
   Check

10. 10. Does water disappear when it evaporates?

    • No, it becomes water vapour in the air.
    • Yes, it is gone forever.
    • No, it turns into ice.
    • Yes, it turns into nothing.
    Check

11. 11. What are rain, snow and hail called in the water cycle?

    • evaporation
    • the atmosphere
    • condensation
    • precipitation
    Check

12. 12. Where does the heat come from to make water evaporate from seas and lakes?

    • the Sun
    • the sea floor
    • the wind only
    • the Moon
    Check

13. 13. How do clouds form in the water cycle?

    • The Sun makes water.
    • Smoke rises into the sky.
    • Water freezes on the ground.
    • Water vapour rises, cools and condenses into tiny drops.
    Check

14. 14. Container A went from 250 to 150 ml in 5 days; container B from 250 to 80 ml. From which did most water evaporate?

    • container A
    • container B
    Check

15. 15. Why might more water evaporate from one container than another?

    • It is a different colour.
    • It is made of glass.
    • It has a wider surface or is in a warmer place.
    • It has less water at the start.
    Check

16. 16. Which change of state needs cooling?

    • melting
    • freezing
    • boiling
    • evaporation
    Check

17. 17. In a model water cycle, a bowl is covered with plastic in the sun. What happens?

    • The plastic melts.
    • The water freezes.
    • Water evaporates, condenses on the plastic and drips into the dish.
    • Nothing happens.
    Check