It is currently 16 Feb 2020, 13:43
My Tests

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

OG_VPR # 24/25 Scientists formerly believed that the rocky p

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
1 KUDOS received
Founder
Founder
User avatar
Joined: 18 Apr 2015
Posts: 9600
Followers: 199

Kudos [?]: 2361 [1] , given: 9138

CAT Tests
OG_VPR # 24/25 Scientists formerly believed that the rocky p [#permalink] New post 12 Oct 2016, 13:19
1
This post received
KUDOS
Expert's post
00:00

Question Stats:

38% (03:49) correct 61% (05:17) wrong based on 26 sessions
Scientists formerly believed that the rocky planets—Earth, Mercury, Venus, and Mars—were created by the rapid gravitational collapse of a dust cloud, a deflation giving rise to a dense orb. That view was challenged in the 1960s, when studies of Moon craters revealed that these craters were caused by the impact of objects that
were in great abundance about 4.5 billion years ago but whose number appeared to have quickly decreased shortly thereafter. This observation rejuvenated Otto Schmidt’s 1944 theory of accretion. According to this theory, cosmic dust gradually lumped into ever-larger conglomerates: particulates, gravel, small and then larger balls, planetesimals (tiny planets), and, ultimately, planets. As the planetesimals became larger, their numbers decreased. Consequently, the number of collisions between planetesimals decreased.
For the following question, consider each of the choices separately and select all that apply.

The passage provides evidence that Schmidt would be likely to disagree with the theory presented in the first sentence over

  • the length of time it took for the rocky planets to form.
  • the most likely causes of the Moon’s impact craters.
  • the importance of cosmic dust as a seminal material in planetary formation.

[Reveal] Spoiler: OA
A


Which of the following best describes the “observation” (line 6) referred to in the passage?

A) The rocky planets were created by the rapid gravitational collapse of a dust cloud.
B) Certain features on the Moon’s surface are impact craters caused by collisions with objects such as planetesimals.
C) The rocky planets were formed by a slow accretion of cosmic dust into increasingly larger bodies.
D) The number of objects colliding with the Moon appears to have been high for a while and then rapidly diminished.
E) There are far fewer planetesimals in existence today than there were about 4.5 billion years ago.

[Reveal] Spoiler: OA
D



Practice Questions
Question: 24-25
Page: 130

_________________

Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos
GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests.

Founder
Founder
User avatar
Joined: 18 Apr 2015
Posts: 9600
Followers: 199

Kudos [?]: 2361 [0], given: 9138

CAT Tests
Re: OG_VPR # 24/25 Scientists formerly believed that the rocky p [#permalink] New post 12 Oct 2016, 13:21
Expert's post
Explanation

24) Choice A is correct. The question asks what Schmidt would disagree with in the rapid-collapse theory. Choice A is correct: According to Schmidt’s own theory, “cosmic dust gradually lumped into ever-larger conglomerates”; this means that planetary formation was a prolonged process, while in the rapid-collapse theory, it happened quickly. Choice B is incorrect: Both theories agree that Moon craters were caused by the impact of cosmic bodies that crashed into the Moon’s surface. Choice C is incorrect: Both theories agree that cosmic dust was the material from which the planets ultimately formed.

25) The “observation” mentioned in the passage is the finding that Moon’s craters “were caused by the impact of objects that were in great abundance about 4.5 billion years ago but whose number appeared to have quickly decreased shortly thereafter.” The answer choice that is closest in meaning to this description is Choice D.
_________________

Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos
GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests.

1 KUDOS received
Intern
Intern
Joined: 29 Mar 2019
Posts: 2
Followers: 0

Kudos [?]: 1 [1] , given: 1

Re: OG_VPR # 24/25 Scientists formerly believed that the rocky p [#permalink] New post 02 Apr 2019, 19:19
1
This post received
KUDOS
the question alludes to the theory in 1st sentence which does not mention moon craters being formed by collisions. In fact, the moon crater formation is explained in the next sentence which is a challenge to the theory in first sentence. How is answer B incorrect?
Intern
Intern
Joined: 18 Jun 2019
Posts: 2
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: OG_VPR # 24/25 Scientists formerly believed that the rocky p [#permalink] New post 19 Jun 2019, 04:50
pradeipp wrote:
the question alludes to the theory in 1st sentence which does not mention moon craters being formed by collisions. In fact, the moon crater formation is explained in the next sentence which is a challenge to the theory in first sentence. How is answer B incorrect?


I agree with you. The passage said that the studies of Moon craters challenged the view in first sentence and rejuvenated Schmidt's theory. So I think B is correct too.
Founder
Founder
User avatar
Joined: 18 Apr 2015
Posts: 9600
Followers: 199

Kudos [?]: 2361 [0], given: 9138

CAT Tests
Re: OG_VPR # 24/25 Scientists formerly believed that the rocky p [#permalink] New post 19 Jun 2019, 07:32
Expert's post
The passage provides evidence that Schmidt would be likely to disagree with the theory presented in the first sentence over

The blue word indicates that the answer choices correct are B and C and A is wrong. However, this was true if the word would be AGREE. Considering that is the contrary, B and C are wrong and only A is correct.

Read the stem very carefully.

Regards
_________________

Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos
GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests.

2 KUDOS received
Intern
Intern
Joined: 17 Jan 2020
Posts: 7
Followers: 0

Kudos [?]: 5 [2] , given: 2

Re: OG_VPR # 24/25 Scientists formerly believed that the rocky p [#permalink] New post 26 Jan 2020, 00:59
2
This post received
KUDOS
Carcass wrote:
The passage provides evidence that Schmidt would be likely to disagree with the theory presented in the first sentence over

The blue word indicates that the answer choices correct are B and C and A is wrong. However, this was true if the word would be AGREE. Considering that is the contrary, B and C are wrong and only A is correct.

Read the stem very carefully.

Regards



I think the other two people understood the question. I think the contention arises because the first theory does not indicate any belief about the craters on the moon (And is challenges by the idea of rocks hitting the moon 4.5B years ago). In fact all the first theory says is that planets are caused by collapsing dust. Clouds of dust directly turn into planets. Only the second theory mention rocks from planet formation. Why would the first theory believe that planet-forming rocks created 4.5 billion years collided with the moon? Its more likely the first theory would believe moon craters are caused by volcanoes or whatever, rather than objects(nonexistant) during planet formation.

It seems like the two theories differ in their beliefs about the cause of moon's craters?

Any alternative explanations would be appreciated!

Regards,
1 KUDOS received
Moderator
Moderator
User avatar
Joined: 03 Dec 2019
Posts: 158
Followers: 1

Kudos [?]: 124 [1] , given: 32

CAT Tests
Re: OG_VPR # 24/25 Scientists formerly believed that the rocky p [#permalink] New post 27 Jan 2020, 12:03
1
This post received
KUDOS
greprepper2 wrote:
Carcass wrote:
The passage provides evidence that Schmidt would be likely to disagree with the theory presented in the first sentence over

The blue word indicates that the answer choices correct are B and C and A is wrong. However, this was true if the word would be AGREE. Considering that is the contrary, B and C are wrong and only A is correct.

Read the stem very carefully.

Regards



I think the other two people understood the question. I think the contention arises because the first theory does not indicate any belief about the craters on the moon (And is challenges by the idea of rocks hitting the moon 4.5B years ago). In fact all the first theory says is that planets are caused by collapsing dust. Clouds of dust directly turn into planets. Only the second theory mention rocks from planet formation. Why would the first theory believe that planet-forming rocks created 4.5 billion years collided with the moon? Its more likely the first theory would believe moon craters are caused by volcanoes or whatever, rather than objects(nonexistant) during planet formation.

It seems like the two theories differ in their beliefs about the cause of moon's craters?

Any alternative explanations would be appreciated!

Regards,


B is not correct. The passage DOES NOT PROVIDE EVIDENCE to conclude that Schmidt would disagree with the theory presented in the first sentence. If there is no evidence in the passage, then we can not infer anything about moon's impact craters that would have made Schmidt disagree with the theory.

Hope that helps.
Intern
Intern
Joined: 17 Jan 2020
Posts: 7
Followers: 0

Kudos [?]: 5 [0], given: 2

Re: OG_VPR # 24/25 Scientists formerly believed that the rocky p [#permalink] New post 28 Jan 2020, 11:37
theBrahmaTiger wrote:
greprepper2 wrote:
Carcass wrote:
The passage provides evidence that Schmidt would be likely to disagree with the theory presented in the first sentence over

The blue word indicates that the answer choices correct are B and C and A is wrong. However, this was true if the word would be AGREE. Considering that is the contrary, B and C are wrong and only A is correct.

Read the stem very carefully.

Regards



I think the other two people understood the question. I think the contention arises because the first theory does not indicate any belief about the craters on the moon (And is challenges by the idea of rocks hitting the moon 4.5B years ago). In fact all the first theory says is that planets are caused by collapsing dust. Clouds of dust directly turn into planets. Only the second theory mention rocks from planet formation. Why would the first theory believe that planet-forming rocks created 4.5 billion years collided with the moon? Its more likely the first theory would believe moon craters are caused by volcanoes or whatever, rather than objects(nonexistant) during planet formation.

It seems like the two theories differ in their beliefs about the cause of moon's craters?

Any alternative explanations would be appreciated!

Regards,


B is not correct. The passage DOES NOT PROVIDE EVIDENCE to conclude that Schmidt would disagree with the theory presented in the first sentence. If there is no evidence in the passage, then we can not infer anything about moon's impact craters that would have made Schmidt disagree with the theory.

Hope that helps.


Yeah that actually makes some sense. I was inferring too much.

I think my mistake was inferring that Schmidt would agree with (rocks causing craters) because that was what rejuvinated his theory. Actually his theory doesn't say anything about the moon.
We can't make this link right?


You know it's so frustrating because the GRE expects you to sometimes make inferences, but sometimes don't. :D
1 KUDOS received
Moderator
Moderator
User avatar
Joined: 03 Dec 2019
Posts: 158
Followers: 1

Kudos [?]: 124 [1] , given: 32

CAT Tests
Re: OG_VPR # 24/25 Scientists formerly believed that the rocky p [#permalink] New post 29 Jan 2020, 03:53
1
This post received
KUDOS
Yes, correct. The first theory doesn’t say anything about moon craters, so we can’t infer that Schmidt would disagree with it.
Re: OG_VPR # 24/25 Scientists formerly believed that the rocky p   [#permalink] 29 Jan 2020, 03:53
    Similar topics Author Replies Last post
Similar
Topics:
New posts Experts publish their posts in the topic With the 1985 discovery of an ozone hole over Antarctica, an Carcass 1 25 Jan 2017, 07:34
Display posts from previous: Sort by

OG_VPR # 24/25 Scientists formerly believed that the rocky p

  Question banks Downloads My Bookmarks Reviews Important topics  


GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.