Across
- 5. the variety in an ecosystem of different kinds of species living there
- 7. Characteristics- include the rate of water flow and the slope of the stream's bed
- 10. purifying a liquid by a process of heating and cooling
- 11. Water- water that humans can drink safely
- 15. Divide- highest point of land on a continent; rivers flow into different oceans depending on which side of the divide they start
- 16. area of land that drains into one main lake or river
- 17. streams of water that move within a larger body of water
- 18. Water- contains a high concentration of the minerals calcium and magnesium
Down
- 1. the average weather measured over a long period of time
- 2. the change in water level
- 3. a group of organisms of the same species that live in a particular area
- 4. a physical characteristic or behavior of a species
- 6. eroded rock fragments and soil carried by water or wind
- 8. the total amount of all salts dissolved in water
- 9. large moving bodies of ice
- 12. to observe,check, or keep track of something for a specific purpose
- 13. Osmosis- forces salt water through a filter or membrane with holes too small for the salts to pass through
- 14. changes in patterns that move along the water's surface
- 16. Quality- describes how pure the water is