benchmark review

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Across
  1. 4. increase nutrients to water
  2. 9. seawater seeps in to aquifer
  3. 10. frozen water in polar region
  4. 11. harmful chemicals added to water
  5. 12. one site pollution
  6. 14. waste that cause harmful orgins
Down
  1. 1. moving from ruralto urban areas
  2. 2. heating natural water
  3. 3. live or dead organs add to water
  4. 5. body of water above ground
  5. 6. many source pollution
  6. 7. water under earth bettween soil or rock
  7. 8. removing harmful bacteria from water
  8. 10. water suitble to drink
  9. 13. rock that holds a body of water
  10. 15. water forms behind a dam