Crossword

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Across
  1. 3. a measure of acidity
  2. 4. water sticks to other substances
  3. 5. organisms that are highly sensitive to pollution
  4. 9. Artificial lake or dam used to store water
  5. 10. Water cools down and goes from a gas to a liquid
  6. 11. this is the "dissolver"
  7. 13. Water found above ground that moves into river basins
  8. 16. water pure enough to drink
  9. 17. this is the substance being dissolved
  10. 18. the measure of clarity in water
Down
  1. 1. the amount of gaseous oxygen dissolved in water
  2. 2. Water that is found beneath the Earth's surface
  3. 3. rain, sleet, snow, hail
  4. 6. water returns to the atmosphere from underground when plants use liquid water during photosynthesis and release water vapor
  5. 7. area covered by ocean water
  6. 8. hole that is dug or drilled through the ground to an aquifer in order to obtain groundwater
  7. 10. water sticks to itself
  8. 12. a measure of dissolved salts in water
  9. 14. Underground river - water filtered by sand and rocks
  10. 15. the drainage area of a filter