Ch. 6: Watersheds

4. Introducing harmful materials into the environment; contamination.
5. Water underground, stored in cracks and pores beneath Earth’s surface.
7. Underground layers of rock that store groundwater.
8. Pollution that comes from many diffuse sources rather than from a single, specific site.
11. The process of a liquid slowly passing through a filter.
12. The process of a body of water becoming nutrient-rich from fertilizer.
14. Water that fills lakes and rivers (water above the ground).
15. An area of land that drains all the streams and rainfall to a common outlet like a reservoir or bay.
16. A depression or dip in the Earth’s surface.
18. Water that has less than 0.2% salt content dissolved in it.
20. To be thoroughly soaked or filled with liquid.
21. Pollution that comes from a single, identifiable location (e.g., a factory pipe).

1. The act of protecting and caring for natural resources.
2. Sinking ground caused by removing water from underground.
3. Shallow areas of land that are saturated with water for part or all of the year.
6. System containing all the solid and liquid water on Earth.
9. Water from the sea or ocean that has an average salinity of 35 ppt.
10. Water that flows over Earth’s surface.
13. The amount of water able to pass through porous material; how fast water flows.
17. Having spaces or holes; porous, holds water.
19. Underground boundary between soil and groundwater.