Unit 7

3. pollution that is discharged over a wide land area and comes from many different sources and locations
5. the supply of fresh water found beneath Earth's surface in the pores of soil, sand, and rock
7. service the positive benefits that an ecosystem provides to people
8. the highest point in an aquifer from which water can be obtainted
11. the ease with which substances such as water move through a material
12. a hole in the ground formed when water has dissolved underground rock to the point where it can no longer support the land surface
14. the contamination of natural water bodies by subtances that harm organisms and the enviroment
15. An underground layer of rock, sand, or gravel

1. when water seeps into the ground and replenishes the aquifer, such as precipition
2. the process of separating solid matter from a fluid by having the fluid pass through pores of another substance
4. The study of geology that is focused on movement of groundwater
6. pollution that can be traced back to a single identifying incident
9. when water leaves the aquifer, such as when it seeps into a spring
10. the amount of space between particles in a substance
13. the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation