The discovery that Earth's inner core rotates independently : GMAT Sentence Correction (SC)
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The discovery that Earth's inner core rotates independently

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The discovery that Earth's inner core rotates independently [#permalink]

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04 Aug 2006, 23:10
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The discovery that Earth's inner core rotates independently of and more qickly than Earth's outer layers is responsible for advancing studies of the flow of heat from the inner through the outer planet and of the formation and periodic reversal in direction of Earth's magnetic field.

a. core rotates independently of and more qickly than Earth's outer layers is responsible for advancing studies of the flow of heat from the inner through the outer planet and of the formation and periodic reversal in direction of Earth's magnetic field.

b. core rotates independently of and more qickly than Earth's outer layers is responsible for advancing studies of how heat from the inner core flows through the outer planet, and the formation and periodic reversal in direction of Earth's magnetic field.

c. core rotates independently of and more qickly than Earth's outer layers are responsible for advancing studies of how heat from the inner flows through the outer planet, and how Earth's magnetic field forms and the periodic reversla of its direction.

d. core, rotating independently of and more qickly than Earth's outer layers, are responsible for advancing studies of the flow of heat from the inner through the outer planet, and the formation and periodic reversal in direction of Earth's magnetic field.

e. core, rotating independently of and more qickly than Earth's outer layers, is responsible for advancing studies of the flow of heat from the inner through the outer planet and of how Earth's magnetic field forms and the periodic reversla of its direction.
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04 Aug 2006, 23:19
Phew!!!!
I think its A.

C and D are out because discovery is singular.

||ism is best in A.

study of the X (flow of heat) and of the Y (formation and periodic reversal)
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Re: SC - Earth [#permalink]

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04 Aug 2006, 23:28
IMO A.

a. core rotates independently of and more qickly than Earth's outer layers is responsible for advancing studies of the flow of heat from the inner through the outer planet and of the formation and periodic reversal in direction of Earth's magnetic field.
=> nothing wrong.
b. core rotates independently of and more qickly than Earth's outer layers is responsible for advancing studies of how heat from the inner core flows through the outer planet, and the formation and periodic reversal in direction of Earth's magnetic field.
=> how ~ and the formation~ not ||

c. core rotates independently of and more qickly than Earth's outer layers are responsible for advancing studies of how heat from the inner flows through the outer planet, and how Earth's magnetic field forms and the periodic reversla of its direction.
=> SVA
d. core, rotating independently of and more qickly than Earth's outer layers, are responsible for advancing studies of the flow of heat from the inner through the outer planet, and the formation and periodic reversal in direction of Earth's magnetic field.
=> SVA
e. core, rotating independently of and more qickly than Earth's outer layers, is responsible for advancing studies of the flow of heat from the inner through the outer planet and of how Earth's magnetic field forms and the periodic reversla of its direction.
=> changes meaning. the discovery is responsible, not the inner core itself.
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04 Aug 2006, 23:37
i got A too. Post this Q up to confirm my own answer since my answer key says C.
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05 Aug 2006, 10:49
It has to be A. Freethinker's explanation says it all ...
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05 Aug 2006, 11:14
seriously no choices here is correct since "qickly" refer to nothing
or we could say kickly
05 Aug 2006, 11:14
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