Science P5 Unit 3.1 - 3.3 - States and properties of matter

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Across
  1. 2. When a substance gains heat, it ___________.
  2. 4. Substances like smoke, dust, and gases from cars and factories make the air dirty. This causes __________________.
  3. 6. The temperature at which a substance boils is its _____________.
  4. 7. The rain and snow that fall from clouds onto the Earth.
  5. 10. The reverse of evaporation.
  6. 13. gas particles can move __________ in all directions.
  7. 14. The melting point of ice is the same as the ____________ point of water.
  8. 15. When a substance loses heat, it ___________.
  9. 17. The amount of heat in a substance.
  10. 18. This is heated water vapour. They are bubbles of gas formed by boiling water.
  11. 19. The melting point of ice is ______ degrees Celsius.
Down
  1. 1. The temperature at which a substance melts is its ______________.
  2. 2. When our wet clothes start to become dry, this process is called ____________.
  3. 3. If pure water is heated until 100 degrees celsius, it will _________.
  4. 5. We measure temperature with a ______________.
  5. 8. liquids can take on the shape of the __________ they are in.
  6. 9. solids cannot be squashed of ___________ because they only vibrate in a fixed position.
  7. 11. a mixture of different gases.
  8. 12. this gas makes up about four-fifths of the air.
  9. 16. the layer of air that surrounds the Earth.