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20 Cards in this Set
- Front
- Back
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31. Which mineral resources are considered renewable?
a. base metals only b. nonmetallic minerals only c. iron and aluminum ores d. No mineral resources are renewable. |
d. No mineral resources are renewable.
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32. The United States has active mines within its boundaries that are sufficient to maintain a steady supply of all strategically important metals.
a. true b. false |
b. false
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33. As compared to coal mining, there is virtually no adverse environmental impact of mineral mining.
a. true b. false |
false
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34. Which of the following types of mass movement takes place most gradually?
a. slump b. creep c. rock slide d. mudflow |
b. creep
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35. Which of the following types of mass movement is least coherent (most like a liquid)?
a. slump b. creep c. rock slide d. mudflow |
d. mudflow
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36. The immediate cause of incidents of mass movement is ____________.
a. electromagnetic attraction b. gravitation c. magnetism d. friction |
b. gravitation
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37. Which of the following factors decreases the risk of mass movement?
a. nearby earthquakes b. excavation into the base of a hill c. adding weight to the top of a hill d. adding vegetation to the side of a hill |
d. adding vegetation to the side of a hill
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38. Which of the following increases the risk of mass movement?
a. adding a small amount of moisture to loose, dry sediment b. waves breaking before they reach sea cliffs c. flooding the sediment with water to the point of saturation d. reducing the grade of the slope |
c. flooding the sediment with water to the point of saturation
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39. For dry sediments, the angle of repose is typically between ____________ degrees.
a. 10 and 17 b. 15 and 22 c. 20 and 27 d. 30 and 37 |
d. 30 and 37
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40. The flat-lying area surrounding a river channel is termed the ____________.
a. base level b. Floodplain c. stream gradient d. thalweg |
b. Floodplain
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41. The lowest elevation to which a stream can downcut is the ____________.
a. base level b. floodplain c. stream gradient d. thalweg |
a. base level
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42. In uniform sediments with a relatively constant slope at the surface, a ____________ drainage network is expected.
a. dendritic b. radial c. rectangular d. trellis |
a. dendritic
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43. Ephemeral streams ____________.
a. consist of a series of intertwined channels that are overloaded with sediment b. have flowing water either episodically or during a portion of the year c. have a channel that is highly sinuous (curvy) |
b. have flowing water either episodically or during a portion of the year
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44. Meandering streams ____________.
a. consist of a series of intertwined channels that are overloaded with sediment b. have flowing water either episodically or during a portion of the year c. have a channel that is highly sinuous (curvy) d. are those that divert flow from streams they have intersected through stream erosion |
c. have a channel that is highly sinuous (curvy)
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45. Braided streams ____________.
a. consist of a series of intertwined channels that are overloaded with sediment b. have flowing water either episodically or during a portion of the year c. have a channel that is highly sinuous (curvy) d. are those that divert flow from streams they have intersected through stream erosion |
a. consist of a series of intertwined channels that are overloaded with sediment
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46. Ultimately, the base level of a stream valley can be no lower than ____________.
a. the average elevation of the continent on which it is found b. sea level c. the average elevation of the ocean basins |
b. sea level
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47. Within a meander, where is sediment most likely to be deposited?
a. on the outer banks of the meander b. on the inner banks of the meander c. uniformly to either side of the meander |
b. on the inner banks of the meander
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48. Which river is a threat to capture the flow of the Mississippi River through stream piracy?
a. Old Muddy River b. New River c. Atchafalaya River d. Zydeco River |
c. Atchafalaya River
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49. At a delta, ____________.
a. stream gradient decreases b. a single channel breaks into multiple, radiating distributary channels c. Both A and B are correct. d. None of the above are correct. |
c. Both A and B are correct.
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50. Geological evidence suggests that many millions of years ago, the Amazon flowed toward the west rather than the east.
a. True b. False |
a. True
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