Across
- 2. Water that is safe for humans to drink.
- 6. The amount of salt in the water.
- 7. A description of the variety of different organisms in the ecosystem
- 9. Observe, check or keep an eye on something.
- 10. Volume,rate of flow and the shape of the stream bed.
- 13. An area of land that drains into one main river or stream.
- 14. The overall ______ of the water.
Down
- 1. Average weather measured over a long period of time.
- 3. A group of organisms that live in one place at the same time.
- 4. The process of boiling and condensing water.
- 5. Eroded rocks and soil carried by water and/or wind.
- 8. Water containing high concentrations of calcium & magnesium.
- 11. The natural rise and fall of the oceans.(Happens twice a day)
- 12. A large moving body of ice.