Water!

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Across
  1. 2. When the sun heats the water it turns to this
  2. 3. When the vapour cools to form clouds
  3. 4. This is the term to describe rain, hail or sleet
  4. 5. Using less water
Down
  1. 1. The name for the evaporation of water
  2. 6. This is water which falls from the clouds