Across
- 2. - Group of organisms of the same species that live in a particular area
- 8. - Include the rate of water flow and the slope of the stream’s bed
- 9. - Change in water level
- 10. - How Pure the water is
- 13. - Operates by forcing salt water through a filter or membrane with holes too small for the salts to pass through
- 15. - Water with a high concentration of of the minerals calcium and magnesium
- 18. - stream of water that moves within a large body of water
- 19. - Area of land that drains into one main lake or river
Down
- 1. - highest point of land on a continent
- 3. - To observe,check, or keep track of something for a specific purpose
- 4. - Average weather measured over a long period of time
- 5. - Water only humans can drink
- 6. - Rock fragments and soil
- 7. - Solution is boiled so that the water evaporates and the salt is left behind
- 11. - Physical characteristics or behavior of a species’ chances of survival in a particular environment
- 12. - Large moving body of ice
- 14. - Total amount of all salts dissolved in water
- 16. - description of the variety of different species in a ecosystem
- 17. - Changes in patterns that move along the water’s surface