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

Questions

1. 1. What is the source of all the materials we use?

   • planet Earth
   • shops
   • factories only
   • the Moon
   Check

2. 2. What is an ore?

   • a fuel
   • a rock that metal is made from
   • a gas
   • a kind of plastic
   Check

3. 3. Which ore is used to make iron?

   • coal
   • chalk
   • hematite
   • bauxite
   Check

4. 4. Which ore is used to make aluminium?

   • slate
   • granite
   • bauxite
   • hematite
   Check

5. 5. What is smelting?

   • filtering dirty water
   • burning oil in a car
   • heating and melting ore to separate the metal
   • mixing sugar and water
   Check

6. 6. What is most plastic made from?

   • sand
   • iron ore
   • wood
   • oil
   Check

7. 7. Which of these is made from oil?

   • glass
   • iron
   • paper
   • petrol
   Check

8. 8. What do we call materials that we burn?

   • metals
   • fuels
   • filters
   • ores
   Check

9. 9. What do fuels contain?

   • iron
   • sand
   • salt
   • carbon
   Check

10. 10. Which gas is made when we burn fuels?

    • nitrogen
    • chlorine
    • oxygen
    • carbon dioxide
    Check

11. 11. Why can burning fuels cause a problem?

    • Too much carbon dioxide makes the Earth warmer.
    • It makes the Earth colder.
    • It makes more oil.
    • It makes rocks soft.
    Check

12. 12. What is natural gas used for?

    • cooking, heating homes and making electricity
    • making paper
    • filtering water
    • making glass
    Check

13. 13. What does 'disposable' mean?

    • used only once
    • made of metal
    • used many times
    • very strong
    Check

14. 14. Why is a reusable shopping bag better than plastic bags?

    • It is made from oil.
    • It is used many times, so there is less rubbish.
    • It is used once.
    • It lasts a short time and is thrown away.
    Check

15. 15. What is cobalt used for?

    • making paper
    • batteries for mobile phones and electric cars
    • making glass
    • cooking food
    Check

16. 16. What is bioplastic made from?

    • sand
    • materials from plants and animals
    • oil only
    • iron ore
    Check