Fragile Earth - Water Crossword

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Across
  1. 2. Added to water to prevent tooth and gum decay.
  2. 4. The type of water which has lots of minerals in it, stopping a large lather from forming.
  3. 7. When water vapour (gas) cools and turns into clouds (think showers!)
  4. 9. Sea water cannot be drunk by humans as it is too s______.
  5. 10. Rain / hail / sleet that falls from the clouds.
  6. 13. Used to measure the temperature of water.
  7. 16. As the level of pollution increases, the volume of which gas decreases?
  8. 17. A medical condition that occurs when you do not drink enough water.
Down
  1. 1. Added to water to kill bacteria and germs.
  2. 3. Something that can be built to prevent flooding.
  3. 5. A period of dry, hot weather leading to a shortage of water.
  4. 6. A method used to separated solids from liquids.
  5. 8. When water on the surface of the ocean turns into water vapour.
  6. 11. Number of litres of water recommended to drink in a day.
  7. 12. A word that describes something that dissolves in water.
  8. 13. To reduce water usage when brushing your teeth, turn off the _____.
  9. 14. If there is lots of rain, or a river breaks its banks, this may happen.
  10. 15. A diarrhoeal disease caused by drinking dirty water.