Chapter 11

2. a substance or thing that has harmful or poisonous effects
4. Buffers vegetated areas next to water resources that protect water resources from nonpoint source pollution
6. Attempts to discover order in nature
9. Artificial lake created where a stream is dammed
10. Physical, chemical, and biological changes that take place after a body of water receives an input of nutrients from erosion or runoff
12. Structure built across a river to control its flow or create a reservoir
14. Broad/Diffuse area where pollutants enter bodies of water/air
17. surface water in abnormal quantity resulting from heavy falls of rain or snow
20. Relatively pure water containing few dissolved salts
21. Combination of 2+ atoms of same or different chemical elements
22. The smallest unit of an element that can exist still containing the unique characteristics of that element
24. Water that does not penetrate the ground or return to the atmosphere
25. Single, Identifiable source that discharges pollutants into the environment

1. Water flowing off the land into bodies of surface water
3. The speed of something in a given direction
5. Land area that delivers water, sediment, and dissolved substances
7. The measure of heat energy required to increase the temperature of a unit
8. the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land
11. Flat valley floor next to a stream channel
13. a 3D view of an object cut in half
15. The volume of water to pass a given point on a stream bank per unit of time
16. areas of unique soil that have water all, or part of, the year
18. Water that sinks into the soil and is stored in aquifers
19. when an area does not get enough water, they suffer a ________
23. form the base of the aquatic food chain