Ch 10, 11, 12sci207

Ch 10, 11, 12sci207 - Chapter 10, 11, and 12 Chapter 10...

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Chapter 10, 11, and 12 Chapter 10 Questions 1, 5, 6 and Discussions 1 and 6 Q. 1. Describe the path a molecule of water might follow through the hydrologic cycle from the ocean to land and back again. The path a molecule of water might follow through the hydrologic cycle begins where the water from the ocean evaporates through transpiration, which is transport plus evaporation into the atmosphere. Then, as the water from the moist surfaces evaporates, it falls as rain, snow, hail, or sleet. As the water is here on the ground it passes through all living organisms. Once it does that it returns to the ocean and the process starts all over again. Q. 5. Describe at least one example of the environmental costs of water diversion from rivers to farms or cities. One example of environmental costs when diverting water from rivers and lakes to farm and cities is ecosystems being greatly affected. Where the water is located before the diversion there is an ecosystem that is used to all this water. When it is taken away, if species’ can not adapt to this change, they will become endangered or even extinct. The same goes for the ecosystem where the water ends up after it is diverted. They are used to live without so much water and now have to try and adapt or die. Villages have to be relocated and cities also lose their farming and fishing, for some it affects ones health. Eventually, the water that is being diverted leaves behind toxic salt flats as the little bit of water left evaporates. This causes problems for everyone. These dams that are used to divert water also cause the loss of the free-flowing rivers, which need some source of water to keep flowing without evaporating. Q. 6. Explain the difference between point and non-point pollution. Which is harder to control? Why? Factories, power plants, sewage treatment plants, underground coal mines and oil wells are all considered point sources because they discharge pollution from specific places like drain pipes, ditches or sewer pipes that lead to a specific body of water. Non-point sources of water have no specific location where they discharge from and still end up in certain bodies of water. Non-point sources are much harder to control because the original area of where the water began is much harder to figure out. It could come from farm or industrial run-offs, or from people like you or me. At least with point sources one knows exactly where the water is coming from and it is much easier to monitor and regulate than that of non-point sources. D. 1. What changes might occur in the hydrologic cycle if our climate were to warm or cool significantly? Because our systems have adapted to the temperatures that one area has, by changing the
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Ch 10, 11, 12sci207 - Chapter 10, 11, and 12 Chapter 10...

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