9. Three percent of the world’s water resources are found as a. fresh water. c. icecaps and glaciers. b. salt water. d. groundwa
ter. _____ 10. Most of the pollutants in the ocean come from a. commercial boats and personal watercraft. b. spills from oil tankers. c. activities on land. d. leaking underground storage facilities. _____ 11. The largest watershed in the United States is the a. Mississippi River. c. Colorado River. b. Yukon River. d. Rio Grande. _____ 12. During the water treatment process, what is the purpose of adding chlorine to water? a. to remove large debris b. to form flocs c. to kill or limit bacterial growth d. to remove unwanted gases
97% of the world's water resources are found in salt water.
3% are found in icecaps and glaciers
The Mississippi River watershed is the largest in America with an area of 3.2 million square kilometers. it is the fourth largest in the world. It covers about 40% of the continental landmass of the US
Water temperatures increase because the trees that provide cover from sunlight are cut down. All of these factors disrupt a river ecosystem because the species that live in the stream have adapted to conditions before the deforestation and may be negatively impacted by the sudden changes.
