Across
- 1. nature's water purification system
- 3. dilutes and flushes away ____________
- 6. one of the driving factors of the water cycle, controlled by the sun.
- 8. slows the runoff of excess water
- 9. Water is called the universal ____________
- 10. one of the driving factors of the water cycle
- 11. water helps create by weathering rock
- 12. stored underground in huge aquifers
- 13. carries away ______ products in cells
- 14. standard test for organic materials
- 17. land area that absorbs the runoff from rain and snow
- 20. removal of salt from water
- 21. level below which soil is saturated with water
Down
- 2. most aquatic animals need 4-5ppm to survive
- 4. total measure of suspended solids, murkiness
- 5. _________ of water helps cool plants and animals
- 7. water is constantly _____________
- 15. material that changes or dissolves most other materials
- 16. measure of hydrogen ions in water
- 18. total concentrations of dissolved ions in water, i.e. salt
- 19. most of the water on earth is this