Lesson T1.2.1

T1.2.1 Changes of state explained by particles Quiz: KS3 Chemistry, Unit 1

20 questions

In partnership with Revision Ninja

Lesson T1.2.1, Changes of state explained by particles: 20 multiple choice questions for the KS3 Chemistry (National Curriculum), Unit 1: The particulate nature of matter, written with Revision Ninja.

Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.

Host this setFree Play

The 20 questions

  1. What happens to particles when a solid melts into a liquid?

    • Spread widely apart
    • Slide past each other
    • Form fixed crystals
    • Stop moving entirely
  2. What is the name of the change when a liquid turns into a gas at its surface?

    • Evaporation
    • Freezing
    • Condensation
    • Sublimation
  3. What is the name of the change of state when a gas turns into a liquid?

    • Melting
    • Sublimation
    • Condensation
    • Evaporation
  4. Which change of state is the reverse of melting?

    • Freezing
    • Sublimation
    • Condensation
    • Boiling
  5. Which change of state takes a solid straight to a gas?

    • Sublimation
    • Freezing
    • Condensation
    • Evaporation
  6. What happens to the temperature of a pure substance while it is melting?

    • Fluctuates randomly
    • Decreases steadily
    • Stays constant
    • Increases rapidly
  7. Which of these changes is a reversible physical change?

    • Rusting iron
    • Burning wood
    • Cooking an egg
    • Freezing water
  8. Where do bubbles form in a liquid during boiling?

    • Only at the bottom
    • Only at the surface
    • Outside the container
    • Throughout the liquid
  9. Water in a puddle disappears on a warm sunny day. Which change of state is this?

    • Condensation
    • Melting
    • Freezing
    • Evaporation
  10. Which change of state causes dew to form on grass overnight?

    • Evaporation
    • Melting
    • Condensation
    • Sublimation
  11. What is the name of the change when ice turns directly into water vapour?

    • Condensation
    • Melting
    • Evaporation
    • Sublimation
  12. Why does a liquid evaporate even when below its boiling point?

    • Liquid expands fully
    • All particles boil
    • Surface particles escape
    • Pressure forces escape
  13. Which change of state requires particles to lose energy?

    • Boiling
    • Evaporation
    • Melting
    • Freezing
  14. What happens to particles when a gas cools to form liquid droplets?

    • Lose energy
    • Stay identical
    • Gain energy
    • Expand further
  15. Why does a solid expand slightly when heated before it melts?

    • Absorb water
    • Vibrate more
    • Multiply rapidly
    • Decrease mass
  16. Where do vapour bubbles form during the boiling of a liquid?

    • Inside liquid
    • Glass walls
    • Only surface
    • Air above
  17. How do gas particles compare to liquid particles in energy and spacing?

    • More energy
    • Heavier mass
    • Less energy
    • Tighter packed
  18. What state is a pure substance at 50 degrees Celsius if it melts at 0 and boils at 100?

    • Liquid
    • Plasma
    • Solid
    • Gas
  19. What term describes the temperature at which a pure substance changes from solid to liquid?

    • Freezing point
    • Melting point
    • Boiling point
    • Condensation point
  20. Which energy change occurs when a substance freezes?

    • Energy released
    • Energy absorbed
    • Energy created
    • Energy destroyed

All KS3 Chemistry quizzes