Across
- 4. solution is boiled so that water evaporates and leaves the salt behind
- 6. contains a high concentration of the minerals calcium and magnesium
- 8. group of organisms of the same species that live in a particular area
- 10. area of land that drains into one main rive or lake
- 11. highest point of land on a continent
- 12. forces salt through a filter or membrane with too small holes for salt to pass through
- 13. changes in patterns that move along the waters surface
- 14. supply of water to land or crops to help growth
- 15. water that humans can drink safely
- 18. process of eroding or being eroded by wind, water, or other natural agents
- 19. the total amount of salt dissolved in the water
- 20. streams of water that move within a larger body of water
- 22. the highest level the water will reach on shore
- 23. eroded rock fragments and soiled carried by water or wind
- 25. average weather measured over a long period of time
Down
- 1. the lowest level the water will reach on shore
- 2. a winding curve or bend of a river
- 3. describes how pure the water is
- 5. can't be eroded by water
- 7. characteristics used to describes a river or stream
- 9. large moving bodies of ice
- 16. physical characteristics or behavior of a species that increases the species survival
- 17. variety of different species in an ecosystem
- 21. daily changes in the water level of oceans
- 24. to observe something for a specific purpose\