The discovery that Earths inner core rotates independently : GMAT Sentence Correction (SC)
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# The discovery that Earths inner core rotates independently

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The discovery that Earths inner core rotates independently [#permalink]

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20 Oct 2006, 17:26
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The discovery that Earthâ€™s inner core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field.

A. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field
B. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field
C. core rotates independently and more quickly than Earthâ€™s outer layers are responsible for advancing studies of how heat from the inner core flows through the outer planet, and how Earthâ€™s magnetic field forms and the periodic reversal of its direction
D. core, rotating independently and more quickly than Earthâ€™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 Earthâ€™s magnetic field
E. core, rotating independently of and more quickly than Earthâ€™s outer layers, is responsible for advancing studies of the flow of heat from the inner through the outer planet and of how Earthâ€™s magnetic field forms and the periodic reversal of its direction
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20 Oct 2006, 18:16
Should be A

The discovery that Earthâ€™s inner core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field
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20 Oct 2006, 20:31
Allen760 wrote:
The discovery that Earthâ€™s inner core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field.

A. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field
B. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field
C. core rotates independently and more quickly than Earthâ€™s outer layers are responsible for advancing studies of how heat from the inner core flows through the outer planet, and how Earthâ€™s magnetic field forms and the periodic reversal of its direction
D. core, rotating independently and more quickly than Earthâ€™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 Earthâ€™s magnetic field
E. core, rotating independently of and more quickly than Earthâ€™s outer layers, is responsible for advancing studies of the flow of heat from the inner through the outer planet and of how Earthâ€™s magnetic field forms and the periodic reversal of its direction

The highlighted text shows problems with different options. I would go with A.
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21 Oct 2006, 03:48
B
Highlighted parts negate A, C, D and E.

A. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field
B. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field
C. core rotates independently and more quickly than Earthâ€™s outer layers are responsible for advancing studies of how heat from the inner core flows through the outer planet, and how Earthâ€™s magnetic field forms and the periodic reversal of its direction
D. core, rotating independently and more quickly than Earthâ€™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 Earthâ€™s magnetic field
E. core, rotating independently of and more quickly than Earthâ€™s outer layers, is responsible for advancing studies of the flow of heat from the inner through the outer planet and of how Earthâ€™s magnetic field forms and the periodic reversal of its direction
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21 Oct 2006, 03:55
A, B suggests the discovery is responsible for the reversal of polarity IMHO

B. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field
C. core rotates independently (need of) and more quickly than Earthâ€™s outer layers are (should be is) responsible for advancing studies of how heat from the inner core flows through the outer planet, and how Earthâ€™s magnetic field forms and the periodic reversal of its direction
D. change of meaning
E. change of meaning
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21 Oct 2006, 07:38
Phew...toughy!

At least two reasons why the answer should be (B)

The discovery that Earthâ€™s inner core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field.
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21 Oct 2006, 09:00
I like A for ||ism

B. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field
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21 Oct 2006, 09:13
mailtheguru wrote:
I like A for ||ism

B. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field

"the flow of heat..." (passive) vs "how heat flows..." (active)

Which construction is favored?
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21 Oct 2006, 09:18
Getting A too

A. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field

Studies is implicit in the second half .
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21 Oct 2006, 20:20
ivymba wrote:
Getting A too

A. core rotates independently of and more quickly than Earthâ€™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 Earthâ€™s magnetic field

Studies is implicit in the second half .

You guys are correct. Missed that second "of" late last night.
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22 Oct 2006, 21:36
Damn ! I selected B too .... missed the of -of construction and was looking for "responsible for -for " construction .... damn !

I'll take a break and listen to Yanni for sometime .... phew, life sucks !
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22 Oct 2006, 21:36
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