Across
- 2. quality- describes how pure water is
- 5. Water- water that humans can safely drink
- 7. profile- description of its characteristics including flow rate steepness of stream beds and erosion
- 10. the solution is boiled so that the water evaporates and leaves the salt behind
- 11. tide- highest level of water
- 12. osmosis- operates by forcing salt water through a filter or membrane with holes too small for the salts to pass through
- 13. large moving bodies of ice
- 14. the total amount of all salts dissolved in water
- 16. observe
- 17. can affect other objects in the water.
- 18. the regular rising and falling of very large bodies of water
Down
- 1. movements on the surface of water
- 3. tide- lowest level of water
- 4. area of land that drains into one main lake or river
- 6. take water from places that have plenty that need water very badly
- 8. an ecosystem which refers to the variety of different kinds of species living there
- 9. the average weather measured over a long period of time
- 15. water- contains a high concentration of the minerals, calcium and magnesium