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Unit 6 Practice Quiz

Unit 6 Practice Quiz - U N IT 6 1 Geologically speaking the...

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UNIT 6 1. Geologically speaking, the water table: A. Rises in elevation during times of drought as trees suck it up, and sinks during rainstorms as trees quit pulling up water because they are well-watered. B. Never changes its elevation, because it is pinned by the creeks. C. Changes elevation randomly. D. Rises during or soon after rainstorms as spaces fill up, and sinks during droughts as water drains away. E. Sits next to the Pepsi table in Kern Commons. As trees suck up water during droughts, air enters spaces where water once was, so the water table (which is the bottom of the region with some air in spaces) must sink in elevation. Creeks do change in elevation between rain and drought (floods happen…), and while there are random elements in the world, this is surely not one of them. (Whenever someone claims something is random, at least suspect that the person is really saying “I don’t know what I’m talking about, and I’m too lazy to find out.”) And we have not seen the water table in Kern Commons; that would be a really nasty flood! Points Earned: 1/1 Correct Answer: D Your Response: D 2. In the map above, blue shows the Mississippi River, and the Gulf of Mexico, around the Birdfoot Delta of the river. The USGS image uses different colors to indicate changes in the delta. Orange and red both indicate change in one direction, whereas yellow and green indicate change in the other direction. Given what we discussed in class, in the textbook, in the slide shows, and in the powerpoint outline:
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A. Orange and red indicate gain of wetlands over time, whereas yellow and green indicate loss of wetlands over time. B. Orange and red indicate loss of wetlands over time, whereas yellow and green indicate gain of wetlands over time. The Mississippi Delta is sinking below the waves, so the widespread orange and red must indicate loss of wetlands. Points Earned: 1/1 Correct Answer: B Your Response: B 3. In the picture above, Dr. Alley is discussing events that are happening outside of Grand Canyon National Park, which may impact the park. What are the issues he is discussing? A. Water spread on golf courses is causing flooding in the park. B. Plastic pieces, such as the straw he is holding in the picture to your right, are littered outside the park, and will break down and release toxins that pollute the waters of the park. C. A terrible shortage of Pepsi has alarmed the Park Service. D. Water spread on golf courses is introducing nitrates into the park. E. Water pumped out of the ground for golf courses and other uses evaporates, so less water flows through the ground to the springs of the canyon.
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Water soaks into the ground on the plateaus beside the canyon, seeps down to hit a rock layer that blocks the flow, and flows along that layer to feed beautiful and biologically important springs in the Canyon. Pumping water out of the ground on the plateaus to use for humans generally allows the water to evaporate (say, from the grass of a golf course) or run down a
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