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To map Earth's interior, geologists use a network of seismometers to

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Re: To map Earth's interior, geologists use a network of seismometers to [#permalink]

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New post 22 Jun 2017, 08:41
To map Earth's interior, geologists use a network of seismometers to chart seismic waves that originate in the earth's crust and ricochet around its interior, most rapidly traveling through cold. dense regions and slower through hotter rocks.

A. interior, most rapidly traveling through cold, dense regions and slower - "rapidly" not parallel to "slower"
B. interior, which travel most rapidly through cold, dense regions, and more slowly - "rapidly" parallel to "slowly" BUT "which" refers to "interior" making therefore an incorrect reference
C. interior, traveling most rapidly through cold, dense regions and more slowly - CORRECT "rapidly" parallel to "slowly" + "traveling" modifies the previous clause
D. interior and most rapidly travel through cold, dense regions, and slower - "rapidly" not parallel to "slower"
E. interior and that travel most rapidly through cold, dense regions and slower - "rapidly" not parallel to "slower"
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NOTE: I am not an expert, therefore my analysis answering the questions may be incorrect and may not be relied upon. However I will appreciate if you can correct the mistakes I may have made in my analysis.

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Senior Manager
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Re: To map Earth's interior, geologists use a network of seismometers to [#permalink]

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New post 14 Oct 2017, 10:21
To map Earth's interior, geologists use a network of seismometers to chart seismic waves that originate in the earth's crust and ricochet around its interior, most rapidly traveling through cold, dense regions and slower through hotter rocks.

A. interior, most rapidly traveling through cold, dense regions and slower
- "rapidly" is NOT // w/ "slower"

B. interior, which travel most rapidly through cold, dense regions, and more slowly
- ", which" incorrectly refers to "interior". How can interior travel rapidly?

C. interior, traveling most rapidly through cold, dense regions and more slowly
- correct as is.

D. interior and most rapidly travel through cold, dense regions, and slower
- same as "A". "rapidly" and slower" are NOT //

E. interior and that travel most rapidly through cold, dense regions and slower
- same as "A". "rapidly" and slower" are NOT //

pretty easy here once you understand that they're testing parallelism. "rapidly" and "slowly" are both adverbs that need be parallel. once you get this, you've got a 50/50 shot!

Kudos please if you find this helpful :)

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Re: To map Earth's interior, geologists use a network of seismometers to [#permalink]

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New post 31 Oct 2017, 02:20
To map Earth's interior, geologists use a network of seismometers to chart seismic waves that originate in the earth's crust and ricochet around its interior, most rapidly traveling through cold, dense regions and slower through hotter rocks.

A. interior, most rapidly traveling through cold, dense regions and slower
it should not be most rapidly traveling but instead "traveling most rapidly" as it also modifies the latter action slower. INCORRECT.

B. interior, which travel most rapidly through cold, dense regions, and more slowly
Usage of relative pronoun "which" is incorrect here.

C. interior, traveling most rapidly through cold, dense regions and more slowly
CORRECT.

D. interior and most rapidly travel through cold, dense regions, and slower
HERE THE STRUCTURE of the sentence becomes,
Geologists use a network of seismometers to chart seismic waves
that originate in the earth's crust and
ricochet around its interior and
most rapidly travel through cold, dense regions, and slower through hotter rocks.

This structure distorts the intended meaning. The VERB-ING modifier in the option C is providing the additional information for the seismic waves that ricochet around the interior of the earth crust. But as per the structure of the option D that essence is lost.

E. interior and that travel most rapidly through cold, dense regions and slower
the presence of "that" after and again distorts the intended meaning. INCORRECT.

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Re: To map Earth's interior, geologists use a network of seismometers to [#permalink]

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New post 30 Nov 2017, 19:42
souvik101990 wrote:
To map Earth's interior, geologists use a network of seismometers to chart seismic waves that originate in the earth's crust and ricochet around its interior, most rapidly traveling through cold, dense regions and slower through hotter rocks.

A. interior, most rapidly traveling through cold, dense regions and slower
B. interior, which travel most rapidly through cold, dense regions, and more slowly
C. interior, traveling most rapidly through cold, dense regions and more slowly
D. interior and most rapidly travel through cold, dense regions, and slower
E. interior and that travel most rapidly through cold, dense regions and slower


IMO: I could reach the right answer even without considering SLOWER vs SLOWLY slipt,
As soon As I read the Q, this is how I slashed and burned the given sentence "Geologists use X,<answer choices selection>".
So, in this kind of a structure, GMAT often continue with
1. Geologists use X, Y (OR) Geologists use X, and Y --> In both the case, list has to follow the parallelism rules, in which case -USE A NETWORK OF SEI TO, should be parallel with the next coming sentence

2. Geologists use X, which is a great technology --> In this type of a structure, author want to give an extra information about X
3. Geologists use X, Verb+ing ---> This is a modified structure of the sentence, in which author want to give a feel of Cause and effect.

So, Considering the above structure of the sentences

A, B, D & E - neither of these choices falls under any of the structures mentioned above. - Clear elimination.
C - Answer
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Shravan
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Kudos [?]: 2 [0], given: 31

Re: To map Earth's interior, geologists use a network of seismometers to   [#permalink] 30 Nov 2017, 19:42

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