Benchmark Review

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Across
  1. 2. an increase in the amount of nutrients
  2. 3. pollution one specific site of pollution
  3. 6. any heating of natural water that results from human activity
  4. 8. occurs when live or dead organisms are added to water supplies
  5. 12. growth of towns and cites due to people moving rural areas to uraban areas.
  6. 15. water supplies
  7. 17. froze layer of soil in polar regions
Down
  1. 1. when harmful chemicals are added to water supplies
  2. 4. a body of rock or sediment that can store water.
  3. 5. when waste or other material causes water to become harmful to organisms
  4. 7. removeing harmful bacteria and microbes from water
  5. 9. pollution many small sources of pollution
  6. 10. body of water above ground.
  7. 11. water under earth's surface in spaces in rock or soil; can be liquid or frozen
  8. 13. a body of water that usually forms behind a dam
  9. 14. intrusion overuse of groundwater causes seawater to seep in aquifers,contaminat
  10. 16. water that is suitable to drink