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

Questions

1. 1. What is a mixture?

   • a type of sieve
   • one pure material
   • two or more materials mixed together
   • a kind of gas
   Check

2. 2. How does a sieve work?

   • It melts the mixture.
   • It pulls metals out.
   • Small pieces fall through the holes and big pieces stay in.
   • It dissolves the small pieces.
   Check

3. 3. What equipment would you use to separate iron pins from sand?

   • a funnel
   • a magnet
   • a cup
   • a spoon
   Check

4. 4. What equipment would you use to separate soil from old plant roots?

   • a sieve
   • a magnet
   • a thermometer
   • a ruler
   Check

5. 5. Marcus mixed beans and salt. How can he separate them?

   • use a sieve
   • shake it in a bag
   • use a magnet
   • add more beans
   Check

6. 6. Rice and sand go through a sieve. Which goes through the holes?

   • the sand
   • the rice
   Check

7. 7. What word do we use for things like sieves and magnets that help us do things?

   • materials
   • equipment
   • gases
   • mixtures
   Check

8. 8. Why is it better to separate a mixture with equipment than by hand?

   • It makes more mixture.
   • It changes the materials.
   • It is much faster.
   • It is slower.
   Check

9. 9. Do the properties of each material change when they are made into a mixture?

   • Yes
   • No
   Check

10. 10. You have a mixture of sand, rice and paperclips. What should you use first to take out the paperclips?

    • a funnel
    • a cup of water
    • a magnet
    • a sieve
    Check

11. 11. What makes a good diagram?

    • It has lots of colours.
    • It has no labels.
    • It is very small.
    • It is neat and everything is labelled.
    Check

12. 12. A mixture has magnetic and non-magnetic metals. How can it be separated?

    • with a sieve with big holes
    • with water
    • by heating it
    • with a magnet
    Check

13. 13. Rice and beans are mixed. Which sieve would separate them?

    • one with no holes
    • one with holes smaller than rice
    • one with holes bigger than beans
    • one with holes bigger than rice but smaller than beans
    Check