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# Because Halley’s comet changes orbit slightly during the seventy-six-y

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Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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26 Sep 2009, 11:52
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31% (01:15) correct 69% (01:10) wrong based on 511 sessions

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Because Halley’s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.

(A) between passing
(B) of passing
(C) between its passes
(D) of its passes
(E) as it passes
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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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29 Sep 2009, 06:08
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manojgmat wrote:
I too chose E, can someone explain more why C is good? some explanation is there above but kind of confusing really.

The subject of the sentence is "comet" ( or call Halley's comet).

Now note that the second part of the sentence is not referring to the comet but to comet's ordit, so a noun/pronoun is required to refer to comet's orbit

Because Halley’s comet changes orbit slightly during the seventy-six-year interval between the comet's orbits close to Earth, it may veer onto a collision course with a planet sometime in the distant future.

There are two nouns in this sentence "comet" and comet's "comet's orbit/passes" and a pronoun "its" is required in the second part of the sentence to refer to "orbit/passes"
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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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28 Sep 2009, 07:23
1
sagarsabnis wrote:
163. Because Halley’s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.
(A) between passing
(B) of passing
(C) between its passes
(D) of its passes
(E) as it passes

completely lost it please can any 1 explain

C is correct.

The subject of the sentence is "Halley's comet", but the sentence describes the path of the comet. A pronoun is required to refer to "comet's path/pass"
"its" correctly refers to Comet's passes or passing (the comet's action)

The options are narrowed down to C and D. D is better. "between" correctly describes the comet's action between 2 stages.
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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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28 Sep 2009, 23:15
I too chose E, can someone explain more why C is good? some explanation is there above but kind of confusing really.
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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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29 Sep 2009, 07:10
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duttarupam wrote:
Because Halley’s comet changes orbit slightly during the seventy-six-year interval between the comet's orbits close to Earth, it may veer onto a collision course with a planet sometime in the distant future.

Here in subordinate clause, its refer to comet's not comet's orbit's. Comet's orbit doesn't pass in interval close to Earth, but the comet does.

how to define an interval - (interval between two passes of comet close to Earth[*consecutive is implicit]) <== This is what is implied in here by using "between its passes".

Also, 'it' in last clause again refers to Comet not Comet's orbit.
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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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11 Apr 2010, 01:26
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1
OA should be C.

In E, "as it passes" imples that the Comet takes 76 yrs to pass close to Earth. If thats true then people will book trips in advance

So, E is definitly wrong. We are discussing about an interval, which is calculated b/w 2 occurances. So, I think C is correct.
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Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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22 Dec 2012, 05:44
Marcab wrote:
Because Halley’s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.
(A) between passing
(B) of passing
(C) between its passes
(D) of its passes
(E) as it passes

Source: Jamboree

the sentence talks about the change in comets orbit leading to a future possible collision.

I earlier thought if the sentence said 'Because Halley’s comet changes orbit slightly as it passes close to earth,it may.............' here as is used to signify the time when the comet changes orbit. But then 'during the 76 yr interval' wouldn't fit in. 76 yr interval in what?

but may be the author is trying to say -- that the comet passes earth after the interval of every 76 years and during this period it changes course slightly , which may cause a collision........
So this seems to make sense. So IMO it is D (though 'of its passes' sounds bad) passes=when the comet passes earth the 2nd time after 76 yrs
Because Halley’s comet changes orbit slightly during the seventy-six-year interval of its passes close to Earth, it may veer onto a collision course with a planet sometime in the distant future.

Editing my post-- just saw the explanation by Stacy Koprince and a little caveat was added 'Please do not study stuff that you find on random web sites without sourcing or attribution as to the author of the material. If something feels weird or not GMAT-like, don't study it. '
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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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05 Jan 2017, 01:15
4
An interval is BETWEEN two things. Hence options B, D and E can be eliminated.

A preposition must be followed by a noun. Hence "between" also should be followed by a noun. A concrete noun, when it exists, is preferred to a gerund. Hence option C (noun "passes") is better than option A (gerund "passing" - moreover a plural "passings" should have been used because an interval is between two things).

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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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24 Jan 2017, 22:33
1
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accordinng to Oxford dictionary, "interval between" two events and "interval of" a period of time
eg: interval between a flash of lightning and the sound of thunder, interval of half an hour
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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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09 Feb 2017, 17:37
1
I have initially chosen E, while the correct answer is C, but now I see the difference.

Because Halley’s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.

(C) between its passes - implies that the comet changes its orbit between times it passes close to Earth, which makes more sense. I.e. scientist have measured comet's orbit twice in 1900 and then in 1976 at times it passed close to earth. They realized that the comet's orbit has changed between 1900 and 1976
Vs.
(E) as it passes - implies that the comet changes it's orbit in a very moment it passes close to Earth, which makes no sense. Comet can't change its orbit instantly in the moment it passes close to Earth.
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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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19 Aug 2018, 11:36
Can you please explain why C is correct ?
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Re: Because Halley’s comet changes orbit slightly during the seventy-six-y  [#permalink]

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20 Aug 2018, 00:08
Why C could not understand it?
Re: Because Halley’s comet changes orbit slightly during the seventy-six-y   [#permalink] 20 Aug 2018, 00:08
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