GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 22 Sep 2018, 00:26

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.

Close

Request Expert Reply

Confirm Cancel

Planetary bodies differ from one another in their

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Director
Director
avatar
Joined: 29 Jul 2006
Posts: 807
Planetary bodies differ from one another in their  [#permalink]

Show Tags

New post 15 Jul 2007, 01:14
5
6
00:00
A
B
C
D
E

Difficulty:

  85% (hard)

Question Stats:

55% (02:14) correct 45% (02:25) wrong based on 265 sessions

HideShow timer Statistics

Planetary bodies differ from one another in their composition, but most of those in the Solar System have solid surfaces. Unless the core of such a planetary body generates enough heat to cause volcanic action, the surface of the body will not be renewed for millions of years. Any planetary body with a solid surface whose surface is not renewed for millions of years becomes heavily pockmarked by meteorite craters, just like the Earth’s Moon. Some old planetary bodies in the Solar System, such as Europa, a very cold moon belonging to Jupiter, have solid icy surfaces with very few meteorite craters.

If the claims above are true, which one of the following must, on the basis of them, be true?
(A) The Earth’s Moon does not have an icy surface.
(B) If a planetary body does not have a heavily pockmarked surface, its core does not generate enough heat to cause volcanic action.
(C) Some planetary bodies whose cores generate enough heat to cause volcanic action do not have solid icy surfaces.
(D) Some of Jupiter’s moons are heavily pockmarked by meteorite craters.
(E) Some very cold planetary bodies have cores that generate enough heat to cause volcanic action.

Please give reasons for ur answers...
Director
Director
avatar
Joined: 06 Sep 2006
Posts: 690
Re: Planetary bodies differ from one another in their  [#permalink]

Show Tags

New post 15 Jul 2007, 07:27
Between C and E.
C says if X leads to Y then Y should lead to X. Not alwyas true. So C is out.
E is what I pick.
Manager
Manager
avatar
Joined: 24 Jun 2006
Posts: 124
Reviews Badge
Re: Planetary bodies differ from one another in their  [#permalink]

Show Tags

New post 15 Jul 2007, 08:04
i go for E
the stem clearly state on the basis of them"the claims"
looking at answer choices between E and C
only E can be based entirely on those claims.
Claims never talked about some volcanic bodies that do not have ice surface. But about a relation between volcanic activity and craters, here is hour link with answer E...since this icy planet has few craters then based on the claims it must have some volcanic activity thus...
Some Icy planet have volcanic activity
Hence E
Senior Manager
Senior Manager
avatar
Joined: 28 Jun 2007
Posts: 303
Re: Planetary bodies differ from one another in their  [#permalink]

Show Tags

New post 16 Jul 2007, 09:19
boubi wrote:
i go for E
the stem clearly state on the basis of them"the claims"
looking at answer choices between E and C
only E can be based entirely on those claims.
Claims never talked about some volcanic bodies that do not have ice surface. But about a relation between volcanic activity and craters, here is hour link with answer E...since this icy planet has few craters then based on the claims it must have some volcanic activity thus...
Some Icy planet have volcanic activity
Hence E


My choice is E for the same reasons.
Director
Director
avatar
Joined: 29 Jul 2006
Posts: 807
Re: Planetary bodies differ from one another in their  [#permalink]

Show Tags

New post 16 Jul 2007, 09:30
boubi wrote:
i go for E
the stem clearly state on the basis of them"the claims"
looking at answer choices between E and C
only E can be based entirely on those claims.
Claims never talked about some volcanic bodies that do not have ice surface. But about a relation between volcanic activity and craters, here is hour link with answer E...since this icy planet has few craters then based on the claims it must have some volcanic activity thus...
Some Icy planet have volcanic activity
Hence E


Thanks...Great Explanation!!!...OA is E.
Manager
Manager
User avatar
B
Joined: 14 May 2017
Posts: 63
Location: India
GPA: 3.5
WE: Business Development (Education)
Re: Planetary bodies differ from one another in their  [#permalink]

Show Tags

New post 28 Dec 2017, 06:24
A. No. Nothing of that sort is mentioned in the passage. The passage only states that Europa has an icy surface. Doesn’t mention anything about the surface of the moon as such.
B. Very narrow. We can't say for sure. There could be a variety of other reasons.
C.Again we aren't a 100% sure about this.
D.This claims the opposite of what the passage says.

E. Yes. Correct choice. Clue: Last line of the passage.
Senior Manager
Senior Manager
avatar
G
Joined: 02 Apr 2014
Posts: 477
GMAT 1: 700 Q50 V34
Re: Planetary bodies differ from one another in their  [#permalink]

Show Tags

New post 28 Dec 2017, 10:38
ContraPositive into play => E

if not enough heat to cause volcanic action(A) -> the surface of the body will not be renewed for millions of years(B) -> heavily pockmarked by meteorite craters (C)

contrapositive: ~C -> ~B -> ~A

Premise: Europa, a very cold moon belonging to Jupiter, have solid icy surfaces with very few meteorite craters (~C) - negation of heavily pockmarked by meteorite creaters

~C -> ~A => Europa (very cold) with very few metorite craters (~C) -> enough heat to cause valconic action (~A) (negation of not enough heat to cause valconic action)

Answer E captures the above contrapositive nicely, by saying some very cold planetary bodies (Europa) has enough heat to cause valconic action
Re: Planetary bodies differ from one another in their &nbs [#permalink] 28 Dec 2017, 10:38
Display posts from previous: Sort by

Planetary bodies differ from one another in their

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


cron

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.