Water cycle

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Across
  1. 2. fluid matter having no fixed shape but a fixed volume
  2. 3. lowest layer of the atmosphere; where the weather happens
  3. 4. the layers of gas that surround the earth
  4. 7. layers of soil, sand and rocks that store groundwater
  5. 8. an instrument used to measure relative humidity
  6. 9. where water goes underground
  7. 11. rain, snow, sleet, etc.
  8. 13. cloud
  9. 15. turns liquid into vapor/gas
  10. 18. the simplest structural unit of an element or compound
Down
  1. 1. to contaminate water
  2. 3. the loss of water vapor from a plant
  3. 5. when water runs through land
  4. 6. to use material more than once
  5. 10. where ice goes directly to the sky (tops of mts)
  6. 11. being made pure, not mixed with anything else
  7. 12. water in the ground
  8. 14. the path water takes as it is being cycled through the environment
  9. 16. the amount of water vapor given in a volume of air
  10. 17. humidity the percentage of water vapor in the air compared to the maximum amount of water vapor that air can contain at a particular temperature