Chapter 11 Part 3
1- How are dry regions supplied with water?
Watershed
2-What is the difference between a dam and a reservoir?
A dam is a structure that is built across a river to control a rivers flow.
Reservoir is an artificial body of water that usually forms in a dam. Water from a reservoir can be used for flood control,drinking water, irrigation, recreation, and industry.
3-How can water be conserved in agriculture?
Drip irrigation systems offer a promising step towards conversation. They deliver small amounts of water directly to water plants roots by using perforated tubing. Water is released to Plants as needed at a controlled rate.
4-What are 2 possible solutions to help with water shortages and give examples.
Desalination transporting fresh water
5-water pollution is the introduction into water of waste matter or chemicals that are harmful to organisms living in the water or to those that drink or are exposed to the water.
6-What is the difference between point source and nonpoint source pollution? Point source is pollution that comes from a specific site. Nonpoint source is pollution that come from many sources rather than from a specific site.
7- What is the difference between waste water and sewage sludge?
Waste water is is water that contains wastes from homes or industries.
Sweets sludge is the solid materials that remains after treatment.
8-Artificial eutrophication is a process that increases the amount of nutrients in a body of water through human activities, such as water disposal and land drainage.
9-What is thermal pollution? Is a temperature increase in a body of water that is caused by human activity and that has harmful effect on water quality and on the ability of the body of water to support life.
10- How does groundwater pollution occur and give examples?
Pollutants usually enter groundwater when polluted surface water percolates down from the earths surface. Pesticides, herbicides chemical fertilizer
11- How does ocean pollution occur and give examples?
Pollutants are often dumped directly into the ocean. Ships can legally dump wastewater and garbage overboard in some parts of the ocean.
12-Biomagnification is the accumulation of pollutants at successive levels of the food chain.
