Freshwater Resources

1. Freshwater Resources Freshwater Resources reservoir dam groundwater aquifer watershed flood contaminate pollute

2. reservoir dam groundwater aquifer Where is Earth’s usable fresh water found? reservoir (re´zә vwär´) A man-made lake that stores water for later use. dam (dam) A barrier that prevents or restricts the normal flow of water. groundwater (ground´wô´tәr) Precipitation that seeps below the surface of Earth. reservoir streams dam aquifer (a´kwә fәr) An underground layer of rock, sand, or gravel that contains water. river water table aquifer well

3. watershed flood What is a watershed? watershed (wô´tәr shed) An area of land that drains into a specific river. flood (flәd) The flow of water over the banks of a body of water and across land.

4. What is a watershed?

5. contaminate pollute What causes polluted water? contaminate (kәn ta´mә nāt´) To make dirty or impure. pollute (pә lüt´) To make dirty, unclean, or contaminated.

6. How are freshwater resources cleaned? lake or reservoir coagulation sedimentation filtration storage disinfection

7. Review Main Idea Fresh water supplies on Earth are limited. How is fresh water kept available for people to use? Fresh water is stored, cleaned and recycled naturally and by people so that there is enough for people to use.

8. Review Main Idea Where can people find useable sources of fresh water? People can find fresh usable water in running water, standing water, and ground water.

9. Review Problem and Solution How do governments protect fresh water? Fertilizers can pollute the water. Governments can limit the use of chemical pesticides. Water is not polluted.

10. Review Vocabulary Match each word with its definition. reservoir dam groundwater aquifer a barrier that prevents or restricts the normal flow of water A) an underground layer of rock, sand, or gravel that contains water B) C) a man-made lake that stores water for later use precipitation that seeps below the surface of Earth D)

11. Review Vocabulary Match each word with its definition. contaminate pollute watershed flood to make dirty or impure A) the flow of water over the banks of a body of water and across land B) C) an area of land that drains into a specific river D) to make dirty, unclean, or contaminated

12. Review Reading Diagrams What are two ways that people obtain water using man-made construction? reservoir streams dam river aquifer water table well