Science 3 · Unit 2: Mixing materials · Cambridge Primary Science Stage 3

Questions

1. 1. Which material is a solid?

   • water
   • milk
   • air
   • a brick
   Check

2. 2. Which material is a liquid?

   • metal
   • air
   • milk
   • wood
   Check

3. 3. Which material is a gas?

   • rice
   • plastic
   • oil
   • oxygen
   Check

4. 4. Which sentence describes a liquid?

   • It is always hard.
   • It stays the same shape.
   • It spreads out to fill the whole room.
   • It changes shape easily and takes the shape of its container.
   Check

5. 5. Which sentence describes a gas?

   • It spreads out to fill the space around it.
   • It stays the same shape.
   • It is always coloured.
   • It takes the shape of the bottom of its container.
   Check

6. 6. When does a solid change shape?

   • when it is in a cup
   • when it is left alone
   • when it is compressed, stretched, twisted or bent
   • when it is poured
   Check

7. 7. Which gas is most of the air?

   • oxygen
   • nitrogen
   • carbon dioxide
   • hydrogen sulfide
   Check

8. 8. Why can't we see nitrogen and oxygen?

   • They are solids.
   • They are too heavy.
   • They have no colour.
   • They are under the ground.
   Check

9. 9. Which gas smells of rotten eggs?

   • carbon dioxide
   • oxygen
   • hydrogen sulfide
   • nitrogen
   Check

10. 10. Which gas is yellow?

    • nitrogen
    • carbon dioxide
    • oxygen
    • chlorine
    Check

11. 11. Sofia mixes vinegar and bicarbonate of soda. Which gas is made?

    • oxygen
    • nitrogen
    • chlorine
    • carbon dioxide
    Check

12. 12. Carbon dioxide is poured onto a candle flame. What happens?

    • The flame gets bigger.
    • The flame goes out.
    • Nothing happens.
    • The flame turns blue.
    Check

13. 13. A girl blows bubbles. What is inside each bubble?

    • a liquid
    • nothing at all
    • a gas
    • a solid
    Check

14. 14. Is bicarbonate of soda a solid, liquid or gas?

    • a mixture of gases
    • a solid
    • a liquid
    • a gas
    Check

15. 15. Is shampoo a solid, liquid or gas?

    • a solid
    • a gas
    • a mixture of gases
    • a liquid
    Check