Particles

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Across
  1. 3. particles too small to see that make up all matter
  2. 6. a change from one state of matter to another for example from solid to liquid
  3. 9. the temperature at which a liquid freezes
  4. 10. heat changing a liquid into a gas
  5. 11. removal of heat, changing a gas into a liquid
  6. 13. particles that make up everything
  7. 14. removal of heat, changing a liquid into a solid
  8. 15. a solid changing directly into a gas
Down
  1. 1. the gradual mixing of substances caused by the random movement of particles from a region of high concentration to a region of lower concentration
  2. 2. the theory that all matter is made up of particles that are too small to see and that are always moving
  3. 4. there are three states of matter solid, liquid and gas
  4. 5. the temperature at which a solid melts
  5. 7. the temperature at which a liquid boils
  6. 8. a measure of how much matter is packed into a given volume
  7. 12. condensation of water vapour, forming a visible fog of water droplets
  8. 13. heat changing a solid into a liquid