Benchmark Review

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Across
  1. 5. one specific site of pollution
  2. 7. heating of natural water that results from human acivity
  3. 9. body of water that usually forms behind a dam
  4. 11. body of water above the ground
  5. 12. water that is suitable to drink
  6. 13. occurs when live or dead organisms are added to water supplies
  7. 14. when harmful chemicals are added to water supplies
Down
  1. 1. water under Earth's surface in spaces, in rock or soil
  2. 2. a body of rock or sediment that can store alot of water
  3. 3. removing harmful bacteria and microbes from water
  4. 4. many small sources of pollution
  5. 6. increase in the amount of nutrients in water
  6. 8. when waste causes water to become harmful to organisms
  7. 10. growth of communities do to people moving to urban areas
  8. 15. frozen layer of soil in polar regions