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KS3 Chemistry:



10 minutes maximum! (can you do it in 5?)  

Q1-3. The diagram show particles in 3 states of matter:


Yelod - CC 3.0

 1. Which of these diagrams shows the particles in a gas and a solid?

  • A. 'X' shows a gas, 'Y' shows a solid.
  • B. 'Y' shows a gas, 'X' shows a solid.
  • C. 'Z' shows a gas, 'X' shows a solid.
  • D. 'X' shows a gas, 'Z' shows a solid.

2. In which of these diagrams are the particles held in place, vibrating about a fixed point?

  • A. Y only
  • B. Z only
  • C. X and Y
  • D. Y and Z

3. When an ice cube melts, it changes from arrangement...

  • A. Y to X.
  • B. Z to X.
  • C. Z to Y.
  • D. Y to Z.

Q 4-7. These questions are about changes in state:

ice cubes
4. When ice turns from a solid to a liquid, it is ,
5. A gas turning back into a liquid is .
6. When frozen CO2 (dry ice) turns directly to a gas it is .
7. When liquid wax turns back into a solid it is .


8. Which of the following states of matter have no fixed shape?

  • A. Liquids and gases.
  • B. Solids
  • C. Liquids
  • D. Gases


9-10. These balloons have air inside. The air is at room temperature.



9. Which of the statements below best describes the air particles in the balloons?

  • A. The particles are touching each other.
  • B. The particles are widely spaced.
  • C. The particles are held in a rigid shape.
  • D. The particles are very close together but can slide past each other.

10. What prevents the balloons from collapsing inwards?

  • A. The air particles are hitting the sides of the balloon hard, creating a force.
  • B. The air particles are touching, and cannot be compressed.
  • C. The air particles are vibrating, and pushing apart.
  • D. The air particles stick together, and stick to the balloon.