particles and their behaviour

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Across
  1. 1. The different types of stuff that things are made from.
  2. 4. The change of state from liquid to gas that occurs when particles leave the surface of the liquid only. It can happen at any temperature.
  3. 7. The tiny things that materials are made from.
  4. 8. The change of state from solid to gas.
  5. 12. In the solid state, a substance cannot be compressed and it cannot flow.
  6. 14. The temperature at which a substance melts.
  7. 15. The temperature at which a substance boils.
  8. 17. The change of state from gas to liquid.
Down
  1. 1. A material whose properties are not the same all the way through.
  2. 2. A material that is not a mixture. It has the same properties all the way through.
  3. 3. A quality of a substance or material that describes its appearance or how it behaves.
  4. 5. The movement of liquid or gas particles from a place of high concentration to a place of low concentration.
  5. 6. The change of state from liquid to solid.
  6. 9. The change of state from solid to liquid.
  7. 10. To bump into, or hit, a particle or surface.
  8. 11. The change of state from liquid to gas that occurs when bubbles of the substance in its gas state form throughout the liquid.
  9. 13. In the liquid state, a substance can flow but cannot be compressed.
  10. 16. In the gas state, a substance can flow and can also be compressed.