The Particle Theory

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Across
  1. 2. The name for a metal rod made up of two metals
  2. 4. Matter does this when cooled
  3. 5. A less dense object will do this in water
  4. 8. Matter does this when heated
  5. 11. The opposite to melting
  6. 13. Another name for steam
  7. 15. The state of matter where the particles can be compressed
  8. 16. The forces between particles in a solid or liquid, keeping the particles together
  9. 18. Mass divided by volume
  10. 19. To shake slightly
Down
  1. 1. The temperature at which a solid changes into a liquid
  2. 3. The type of energy which causes particles to move faster
  3. 6. The change of state from solid to a gas
  4. 7. The small bits that make up matter
  5. 9. The temperature at which a liquid changes into a gas
  6. 10. To push particles closer together
  7. 12. The opposite to evaporation
  8. 14. Changing from solid to a liquid
  9. 17. The state of matter where the particles are held together tightly