Reading Comprehension (RC) | Re: The binary planet hypothesisthat Earth and the Moon formed simultan

­ ­EXPLANATION QUESTION#3


The passage begins by presenting the binary planet hypothesis about the formation of Earth and the Moon and claiming that the hypothesis fails to explain the disparity in the sizes of Earth’s iron core and the Moon’s iron core relative to their volumes. The passage then introduces an alternative—the giant-impact hypothesis—and argues that this alternative explains the disparity better. Thus, Choice E is correct. The second theory is not presented as having been developed out of the first, so Choice A is incorrect; only the first theory is revealed as inadequate, so Choice B is incorrect; and the two theories are not compared extensively, so Choice D is incorrect. Although “a theory[the binary planet hypothesis] is presented, and then evidence that undermines that theory[the disparity related to iron cores] is discussed,” that description fails to capture the organization of the passage as a whole, so Choice C is incorrect.
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Statistics : Posted by carcass • on 19 Jul 2022, 21:00 • Replies 3 • Views 3678

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