unit 7 ground water

4. the amount of space between particles in a substance
7. when the water seeps into the ground and replenishes the aquifer, such as from precipitation/rain.
8. the highest point in an aquifer from which water can be obtained.
10. the ease with which substances such as water move through a material.
11. the process that explains the relationship between three rock types:igneous, sedimentary and metamorphic.
13. the positive benefits that an ecosystem provides to people.
14. a hole in the ground formed when water has dissolved underground rock to the point where it can no longer support the land surface.
15. the contamination of natural water bodies by substances that harm organisms and environment.

1. pollution that is discharged over a wide land area and comes from many different sources and locations.
2. when the water leaves the aquifer, such as when it seeps into a spring.
3. the supply of fresh water found beneath Earth's surface in the pores of soil, sand and rock.
5. pollution that can be traced back to a single identifying incident, such as a leak underground storage tank or waste discharge from a factory.
6. the process of separating solid matter from a fluid by having the fluid pass through pores of another substance, called a filter.
9. an underground layer of rock, sand or gravel that holds groundwater; a source of well and spring water.
12. the study of geology that is focused on the distribution and movement of groundwater in the soil and rocks of Earth's crust.