benchmark review

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Across
  1. 5. an increase of minerals in water
  2. 6. water under the ground
  3. 7. material that can be harmful to organisms
  4. 9. one specific spot of pollution
  5. 12. water suitable to drink
  6. 14. heating of water caused by human activity
  7. 15. body of rock that can store lots of water
Down
  1. 1. growth of civilization in urban areas
  2. 2. water above the ground
  3. 3. a body of water formed behind a dam
  4. 4. multiple spots of pollution
  5. 8. live or dead organisms are added to water
  6. 9. frozen soil
  7. 10. when salt water seeps into an aquifer
  8. 11. when harmful chemicals are added to water
  9. 13. filtration of water