Science - Water

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Across
  1. 6. Top level of an aquifer
  2. 7. Type of contaminant
  3. 8. Underground area saturated with water
  4. 10. Only substance found naturally in all three states
  5. 11. Unwanted substance in a mixture
  6. 12. Change of state from gas to solid
  7. 14. Process of removing salt from water
  8. 16. Desalination requires a great deal of ...
Down
  1. 1. Pure water has no ...
  2. 2. 97% of world's water
  3. 3. Water is made of one oxygen and two ... atoms
  4. 4. Change of state from gas to liquid
  5. 5. Change of state from solid to gas
  6. 9. This chemical increases algae growth
  7. 13. Amount of dissolved salt in water
  8. 15. Result of water vapour condensing around burned fossil fuels