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10 Feb 2020, 17:32
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
68% (02:04) correct
32%
(02:18)
wrong
based on 562
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The highest mountain ranges are formed by geological forces that raise the earth’s crust: two continent-bearing tectonic plates of comparable density collide and crumple upward, causing a thickening of the crust. The erosive forces of wind and precipitation inexorably wear these mountains down. Yet the highest mountain ranges tend to be found in places where these erosive forces are most prevalent.
Which one of the following, if true, most helps to reconcile the apparent conflict described above?
(A) Patterns of extreme wind and precipitation often result from the dramatic differences in elevation commonly found in the highest mountain ranges.
(B) The highest mountain ranges have less erosion-reducing vegetation near their peaks than do other mountain ranges.
(C) Some lower mountain ranges are formed by a different collision process, whereby one tectonic plate simply slides beneath another of lesser density.
(D) The amount of precipitation that a given region of the earth receives may vary considerably over the lifetime of an average mountain range.
(E) The thickening of the earth’s crust associated with the formation of the highest mountain ranges tends to cause the thickened portion of the crust to sink over time.
Which one of the following, if true, most helps to reconcile the apparent conflict described above?
(A) Patterns of extreme wind and precipitation often result from the dramatic differences in elevation commonly found in the highest mountain ranges.
(B) The highest mountain ranges have less erosion-reducing vegetation near their peaks than do other mountain ranges.
(C) Some lower mountain ranges are formed by a different collision process, whereby one tectonic plate simply slides beneath another of lesser density.
(D) The amount of precipitation that a given region of the earth receives may vary considerably over the lifetime of an average mountain range.
(E) The thickening of the earth’s crust associated with the formation of the highest mountain ranges tends to cause the thickened portion of the crust to sink over time.
18 Feb 2020, 06:23
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Akela
Summary in own words:
1.) Platonic plates colliding form more crust and therefore mountain ranges.
2.) Erosive forces such as wind/rain wear mountains down, but are found to be most strongly on the highest mountains.
Whats the conflict?
The conflict is solely Point 2. Erosive forces wear mountains down but are still the strongest on the highest mountains.
We would expect from the answer choices something that explains why the higher the mountains are, the stronger the erosion forces.
(A) Patterns of extreme wind and precipitation often result from the dramatic differences in elevation commonly found in the highest mountain ranges.
Expl: Extreme wind/rain are found normally in highest mountain ranges. Cool! This hits the point! This is pretty much what we wanted to hear. This provides a reason.
So lets keep A) for now and keep looking in the other answer choices to make sure there is not a better answer choice.
(B) The highest mountain ranges have less erosion-reducing vegetation near their peaks than do other mountain ranges.
Expl: This answer talks about vegetation that reduce erosion. The plants do not reduce erosion forces themselves. It may be a tempting answer choice if you miss that detail.
But apart from that, this fact presented by B) does still not explain why there is so much more wind/rain at the highest mountains than on some lower mountains.
Incorrect!
(C) Some lower mountain ranges are formed by a different collision process, whereby one tectonic plate simply slides beneath another of lesser density.
Expl: That lower mountains are formed by a different process has nothing to do with the problem of having higher erosion forces on higher mountains. Remember, the flaw was only about Point 2).? Point 1) was about how mountains are formed, but there never was a flaw about that. So this answer choice has a different focus and is not relevant to us.
Incorrect!
(D) The amount of precipitation that a given region of the earth receives may vary considerably over the lifetime of an average mountain range.
Expl: And why does this explain why we have strong erosion forces on the highest mountains? This does not explain why explicitly high mountains should have explicitly much more erosion forces than other mountains.
Incorrect!
(E) The thickening of the earth’s crust associated with the formation of the highest mountain ranges tends to cause the thickened portion of the crust to sink over time.
Expl: We only want an explanation why we have such strong erosion forces on the highest mountains. Whether the crust portion of mountains sinks or rises over time, or wanders off to completely different locations is not of relevance to explaining the flaw discussed.
Incorrect!
Only One choice is left, so mark A) then.
Hope this helps!
09 Nov 2022, 09:15
Kudos
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The highest mountain ranges are formed by geological forces that raise the earth’s crust: two continent-bearing tectonic plates of comparable density collide and crumple upward, causing a thickening of the crust. The erosive forces of wind and precipitation inexorably wear these mountains down. Yet the highest mountain ranges tend to be found in places where these erosive forces are most prevalent.
Which one of the following, if true, most helps to reconcile the apparent conflict described above?
(A) Patterns of extreme wind and precipitation often result from the dramatic differences in elevation commonly found in the highest mountain ranges.
(B) The highest mountain ranges have less erosion-reducing vegetation near their peaks than do other mountain ranges. - WRONG.
(C) Some lower mountain ranges are formed by a different collision process, whereby one tectonic plate simply slides beneath another of lesser density. - WRONG.
(D) The amount of precipitation that a given region of the earth receives may vary considerably over the lifetime of an average mountain range. - WRONG.
(E) The thickening of the earth’s crust associated with the formation of the highest mountain ranges tends to cause the thickened portion of the crust to sink over time. - WRONG.
We need to find why erosive winds and precipitation and the highest mountains exist together. The passage seems to suggest that the existence of these two is somewhat not logical, asa if the two are against each other. What may have lead the two exist together.
C, D and E are all irrelevant. B is opposite to what we are looking for - it makes things more complex. A is right as it gives a reason for their co-existence i.e. one leads to existence of other.
Answer A.
Which one of the following, if true, most helps to reconcile the apparent conflict described above?
(A) Patterns of extreme wind and precipitation often result from the dramatic differences in elevation commonly found in the highest mountain ranges.
(B) The highest mountain ranges have less erosion-reducing vegetation near their peaks than do other mountain ranges. - WRONG.
(C) Some lower mountain ranges are formed by a different collision process, whereby one tectonic plate simply slides beneath another of lesser density. - WRONG.
(D) The amount of precipitation that a given region of the earth receives may vary considerably over the lifetime of an average mountain range. - WRONG.
(E) The thickening of the earth’s crust associated with the formation of the highest mountain ranges tends to cause the thickened portion of the crust to sink over time. - WRONG.
We need to find why erosive winds and precipitation and the highest mountains exist together. The passage seems to suggest that the existence of these two is somewhat not logical, asa if the two are against each other. What may have lead the two exist together.
C, D and E are all irrelevant. B is opposite to what we are looking for - it makes things more complex. A is right as it gives a reason for their co-existence i.e. one leads to existence of other.
Answer A.
