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