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Becquerel's discovery of radioactivity, and thereby radiometric dating

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Becquerel's discovery of radioactivity, and thereby radiometric dating  [#permalink]

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New post 30 Jun 2018, 01:43
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A
B
C
D
E

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Question Stats:

99% (01:12) correct 1% (01:44) wrong based on 92 sessions

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Becquerel's discovery of radioactivity, and thereby radiometric dating, not only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat as well which would keep Earth's core so warm even billions of years after Earth's creation.


A. not only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat as well which would keep

B. not only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but also provided the mechanism of extra heat, which keeps

C. not only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but also to provide the mechanism of extra heat as well, keeping

D. not only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat which would keep

E. not only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but provided the mechanism of extra heat as well, keeping

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Becquerel's discovery of radioactivity, and thereby radiometric dating  [#permalink]

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New post 30 Jun 2018, 01:56
2
Becquerel's discovery of radioactivity, and thereby radiometric dating, not only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat as well which would keep Earth's core so warm even billions of years after Earth's creation.


A. not only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat as well which would keep
Incorrect comparison--- an action (indicated) of one discovery directly with the other event---- so DID is required
parallelism--- But providing has to be parallel with 'not only indicated'


B. not only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but also provided the mechanism of extra heat, which keeps
CORRECT

C. not only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but also to provide the mechanism of extra heat as well, keeping
Incorrect comparison--- an action (indicated) of one discovery directly with the other event---- so DID is required
parallelism--- But also to provide has to be parallel with 'not only indicated'


D. not only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat which would keep
parallelism--- But providing has to be parallel with 'not only indicated'
tense - which would keep


E. not only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but provided the mechanism of extra heat as well, keeping
Modifier issue----keeping has been converted to modifier

B
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Re: Becquerel's discovery of radioactivity, and thereby radiometric dating  [#permalink]

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New post 30 Jun 2018, 16:59
A. not only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat as well which would keep
Comparison incorrect
But Providing - Parallelism incorrect


B. not only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but also provided the mechanism of extra heat, which keeps
Looks good, although Heat would keep is changed to Heat Keeps

C. not only indicated a much older age of the Earth than Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but also to provide the mechanism of extra heat as well, keeping
Comparison and parallelism incorrect

D. not only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but providing the mechanism of extra heat which would keep
But Providing - Incorrect

E. not only indicated a much older age of the Earth than did Lord Kelvin's thermal calculation of a "young Earth," only 20 million years, but provided the mechanism of extra heat as well, keeping
But ... as well; keeping ... Both are incorrect.

Best Answer B
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Re: Becquerel's discovery of radioactivity, and thereby radiometric dating  [#permalink]

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New post 13 Sep 2018, 06:36

Official Explanation


Split #1a: the GMAT loves the construction “not only ... but also”, but does not like variants, such as “not only ... but”. Choices (A) & (D) & (E) have the latter incorrect form.

Split #1b: the terms connect by the “not only ... but also” construction must be in parallel. All five choices begin with “not only indicated...”, so the parallel term must be “provided”: both “providing” in (A) & (D) and “to provide” in (C) are incorrect.

The
only answer that avoids both of these mistakes is (B), the best possible answer.
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Re: Becquerel's discovery of radioactivity, and thereby radiometric dating   [#permalink] 13 Sep 2018, 06:36
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Becquerel's discovery of radioactivity, and thereby radiometric dating

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