GRE Reading Comprehension

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Source: NO2

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 date.

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.

Question List: 1 2 3 4

It can be deduced from the passage that the gravitation 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

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