Across
- 3. all the area of land that drains in one main lake
- 5. big amounts of water that comes
- 7. water humans can drink safely
- 9. observe check or keep track of something
- 12. group of organisms of one specie
- 14. total ammount of salts dissolved in water
- 15. how pure the water is
- 18. is a high land
Down
- 1. change in water level
- 2. a slowly moving mass or river of ice formed by the accumulation and compaction of snow on mountains or near the poles
- 4. include the rate of water flow
- 6. the way the water moves
- 8. streams of water that move within a larger body of water
- 10. weather measured over a long period of time
- 11. ecosystem different species that live there
- 13. areas across the country have
- 16. a physical characteristic of a specie
- 17. transporting of rock fregments and soil