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    #1

    It can be deduced from the passage that the gravitational force at a point ...

    Hi, I have a problem with the book's answer for the following question from the reading. Please help. Thanks.

    Reading:

    The hypothesis of an expanding Earth has never attracted notable support, and
    if it were not for the historical example of continental drift, such indifference might be
    a legitimate response to an apparently improbable concept. It should be
    remembered, however, that drift too was once regarded as illusory, but the idea was
    kept alive until evidence from physicists compelled geologists to reinterpret their
    data.
    Of course, it would be as dangerous to overreact to history by concluding that
    the majority must now be wrong about expansion as it would be to reenact the
    response that greeted the suggestion that the continents had drifted. The cases are
    not precisely analogous. There were serious problems with the pre-drift world view
    that a drift theory could help to resolve, whereas Earth expansion appears to offer no
    comparable advantages. If, however, physicists could show that the Earth‟s
    gravitational force has decreased with time, expansion would have to be
    reconsidered and accommodated.


    27) It can be deduced from the passage that the gravitational force at a point on the Earth‟s surface is
    (A) representative of the geologic age of the Earth
    (B) analogous to the movement of land masses
    (C) similar to optical phenomena such as mirages
    (D) proportional to the size of the Earth
    (E) dependent on the speed of the Earth‟s rotation

    Answer:
    I opted B but book opted D. I think my answer is correct. What do you think?

  1. bhaisahab's Avatar
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    #2

    Re: It can be deduced from the passage that the gravitational force at a point ...

    Please cite the title and author of the book.
    “Every miserable fool who has nothing at all of which he can be proud, adopts as a last resource pride in the nation to which he belongs; he is ready and happy to defend all its faults and follies tooth and nail, thus reimbursing himself for his own inferiority.”

    — Arthur Schopenhauer

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    #3

    Re: It can be deduced from the passage that the gravitational force at a point ...

    This is one of the readings which are for previous GRE exams from ETS and has not defined author.

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    #4

    Re: It can be deduced from the passage that the gravitational force at a point ...

    The text says that an expanding planet would result in decreased gravity on the surface.

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    #5

    Re: It can be deduced from the passage that the gravitational force at a point ...

    I don't think the text supports any of the proposed conclusions.
    I am not a teacher.

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    #6

    Re: It can be deduced from the passage that the gravitational force at a point ...

    I agree. The entire piece is opinion. You cannot deduce anything from opinion.

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    #7

    Re: It can be deduced from the passage that the gravitational force at a point ...

    But the last sentence of the reading asserts that there is a relation between expansion and gravity force. Expansion is like movement of land masses. So I think that we can deduce B.

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    #8

    Re: It can be deduced from the passage that the gravitational force at a point ...

    If physicists can show that the Earth's gravitational force has decreased with time, expansion will have to be reconsidered and accommodated.

    It can be deduced from that passage that the gravitational force on a point on the Earth's surface is proportional to the size of the Earth.

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    #9

    Re: It can be deduced from the passage that the gravitational force at a point ...

    Thank you Tarheel, finally I got that D is correct. I mis-understand the meaning of expansion. Thank you.

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