Los Angeles Valley College Section 12249 3 units, Winter, 2018 George Leddy, Ph.
ID: 285491 • Letter: L
Question
Los Angeles Valley College Section 12249 3 units, Winter, 2018 George Leddy, Ph.D., instructor Quiz 8 The oceans make up % of the earth's water. 6. Which of the following best describe floodplains? a region of land adjacent to a river that currently flooded due to complex human disturbance patterns b a region of land over which a river has historically e of he above a region of land flooded by farming operations on river courses What percentage of total water is a region of land adjacent to a river a region of land flooded only when humans alter 2. b, 10% C.5% d.3% the world is irrelevant, as water is not currently limiting only a problem in areas not on the coast washing surface water storage electrical production 8 Gray water can be used for irrigating gardens with little treatment, True or False? Water that reaches Earth's surface that does not evaporate be taken up by animals run off 9 Which of the following has not contributed to aquifer sources, including, for example, arsenic and dissolve into aquifers be taken up by plants all of the above b urban paved areas that prevent percolation or infiltration c pathogens entering through wells d leaching of excess fertilizers to aquifers from agricultural We build dams to prevent floods by pumping waste underground 10 While the average depth of the oceans is relatively shallow, the deepest parts of the oceans are deeper than the highest mountains. The Mariana's Trench is ease irrigation 2 miles deep b. 4 miles deep 7 miles deep 11 miles deep e 20 miles deep Page 1 of 2 Answer all questions. careful to erase any wrong mark completely or use another card. Use Scantron two sided 100 question cards (882). Make clear and neat marks. Be DO NOT ALLOW OTHERS TO SEE YOUR ANSWERCExplanation / Answer
97 % of earth water is in ocean, hence d is correct. Human can only use fresh water of river which is even less than 1% hence e is correct. Most of the fresh water is used to cool down the electric generators and hence used in electrical production, hence e is correct. All the first four mentioned options are correct, hence e is correct. Again, all the first four mentioned options are correct, hence e is correct. Flood plains are the area where river flooded when it's overflow, hence b is correct. Various data shows that current frshwater consumption is unsustainable, hence a is correct. It's true that grey water can be used for irrigation which little treatment. Urvan paved areas that prevent percolation does not contaminate the aquifer, hence b is correct. Mariana Trench is approximately 7 miles deep, hence c is correct.
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