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

Questions

1. 1. An 'empty' bottle is pushed under water and bubbles come out. What was inside it?

   • nothing
   • water
   • air
   • sand
   Check

2. 2. Why don't we always know that gases are there?

   • Gases are always solid.
   • Most gases are invisible.
   • Gases are always coloured.
   • Gases only exist in tyres.
   Check

3. 3. Vinegar and bicarbonate of soda are mixed. What state is the new substance that forms?

   • a gas
   • a solid
   • a liquid
   • a metal
   Check

4. 4. In which state are the particles packed together in a regular pattern?

   • liquid
   • all three
   • solid
   • gas
   Check

5. 5. In which state are the particles very far apart and moving fast in all directions?

   • ice
   • gas
   • solid
   • liquid
   Check

6. 6. In which state are the particles close together but can slide past one another?

   • none of them
   • gas
   • liquid
   • solid
   Check

7. 7. Why do liquids flow and take the shape of their container?

   • They have no particles.
   • Their particles are fixed in place.
   • Their particles are very far apart.
   • Their particles can slide past one another.
   Check

8. 8. Why can we squash a gas but not a solid?

   • Gases are heavier.
   • Gas particles have big spaces between them.
   • Solids have no particles.
   • Gas particles are bigger.
   Check

9. 9. How do particles in a solid move?

   • They don't move at all.
   • They vibrate in a fixed position.
   • They move freely in all directions.
   • They slide past each other.
   Check

10. 10. Which gas makes up about four-fifths of the air?

    • oxygen
    • carbon dioxide
    • helium
    • nitrogen
    Check

11. 11. Which gas do we breathe out more of than we breathe in?

    • oxygen
    • nitrogen
    • helium
    • carbon dioxide
    Check

12. 12. What is the atmosphere?

    • the sea
    • the layer of air that surrounds the Earth
    • the Moon's surface
    • the inside of the Earth
    Check

13. 13. Which gas is not normally found in the air we breathe?

    • chlorine
    • nitrogen
    • water vapour
    • oxygen
    Check

14. 14. Which of these causes air pollution?

    • rain
    • trees
    • plants growing
    • smoke from factories and cars
    Check

15. 15. How can air pollution affect people?

    • It has no effect.
    • It helps people breathe.
    • It makes people taller.
    • It can cause coughing, headaches and breathing problems.
    Check

16. 16. Syringe A has particles far apart; syringe B has particles close together. Which plunger is easier to push?

    • A, because gas particles can be pushed closer
    • both are the same
    • B, because liquid particles can be squashed
    • neither can move
    Check

17. 17. Where is air pollution found?

    • only in the sky
    • both outside and inside buildings
    • only outside
    • only in factories
    Check