The Water Puzzle

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Across
  1. 1. Name of the largest ocean.
  2. 3. A pit or hole sunk into the earth to tap an underground source of water.
  3. 5. The movement of water down through the earth's surface.
  4. 6. The constant circulation of water from the atmosphere to the land and the oceans and back again.
  5. 8. A change in the quality of water that makes it unsuitable for certain uses.
  6. 11. Water _________ plant is a place where water is treated to make it safe for drinking.
  7. 13. The wearing down or washing away of soil and land by the action of water, wind or ice.
  8. 15. The temperature at which water changes from liquid into a gas or vice versa.
  9. 17. The percentage of the earth’s water that is fresh water.
  10. 19. A term used to describe the area drained by a river and its tributaries.
  11. 20. The act of adding water to crops.
Down
  1. 2. The process by which water vapor becomes a liquid or a solid.
  2. 4. A possible source of groundwater contamination.
  3. 7. A weather phenomenon where there is a lack of precipitation for a long period of time.
  4. 9. The source of energy for the hydrologic or water cycle.
  5. 10. The temperature at which water changes from solid into a liquid or vice versa.
  6. 12. The name for a smaller stream that flows into a larger stream.
  7. 14. The capacity of porous materials, such as sand and gravel, to transmit water.
  8. 16. Tanks used to hold waste from homes when a sewer line is not available.
  9. 18. The chemical symbol for water.