Unit 2

3. pollution discharged from many sources.
6. process of removing salts from salt water.
11. A maritime habitat featuring grasses and other plants that has adapted to continual, periodic flooding
12. long thin islands that run parallel to the shore
13. artificial lake that forms behind a dam.
16. fresh water on Earth’s surface.
17. The ability of rock or soil to allow water to flow
21. Microscopic organisms that float or drift freely in water
24. buildup of pollutants at higher levels of the food chain.
25. area of land drained by a river.
26. A shallow zone in a fresh water habitat where light reaches
27. introduction of chemical, physical, or biological agents into water.
28. water that is safe to drink.
29. water that contains waste from homes or industry.
30. organisms that cause illness or disease.

1. found in warm shallow ocean waters these are limestone ridges built by tiny animals
2. pollution discharged from a single source.
4. the bottom of a pond or lake
5. an increase in the amount of nutrients in an aquatic ecosystem
7. underground formation that contains groundwater.
8. an area in which fresh water from a river mixes with salt water from the ocean
9. area of Earth’s surface where water percolates down into an aquifer.
10. temperature of a body of water increases.
14. percentage of total volume of rock that has space.
15. Organisms that swim actively in open water
18. eutrophication caused by humans.
19. swamp A tropical marine swamp featuring low, tall trees
20. An area of land that is covered with water at least part of the year
22. flowing network of streams and rivers
23. water beneath the Earth’s surface.
24. Organisms that live at the bottom of the ocean or bodies of fresh water