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

It is currently 18 Nov 2019, 00:06

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

Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran

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

Hide Tags

Find Similar Topics 
Senior Manager
Senior Manager
avatar
G
Joined: 04 Sep 2017
Posts: 291
Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 22 Sep 2019, 20:39
1
5
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

53% (01:51) correct 47% (02:02) wrong based on 338 sessions

HideShow timer Statistics

Scientist: A greenhouse gas, for example, carbon dioxide, forms a transparent layer that traps solar heat beneath it in the earth's atmosphere. Atmospheric levels of carbon dioxide are currently increasing, causing the climate to warm—an effect that is predicted by at least one computer model of the greenhouse effect. But the warming that has occurred is a great deal less than what would be expected based on the model. Therefore, _______.

Which of the following most logically completes the scientist's argument?

A. better measurements of atmospheric levels of carbon dioxide are needed
B. the definition of “greenhouse gas” should probably be reconsidered
C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
D. the computer model of the greenhouse effect must be incorrect in some respect
E. the likely consequences of any warming of the climate are unlikely to be much less damaging than predicted


CR51080.01
Senior Manager
Senior Manager
User avatar
G
Joined: 10 Sep 2013
Posts: 315
Location: India
GMAT 1: 720 Q50 V38
GPA: 4
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 23 Sep 2019, 11:13
3
I was very tempted to choose but invested 1 more minute to arrive at D.

C says that other factors may still exist. But nowhere in the stem it is mentioned that the model has not considered other factors. D, on the other hand, is a clear winner.
Verbal Forum Moderator
User avatar
V
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 2430
Location: India
Concentration: General Management, Strategy
Schools: Kelley '20, ISB '19
GPA: 3.2
WE: Information Technology (Consulting)
GMAT ToolKit User Reviews Badge CAT Tests
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 23 Sep 2019, 11:46
1
Scientist: A greenhouse gas, for example, carbon dioxide, forms a transparent layer that traps solar heat beneath it in the earth's atmosphere. Atmospheric levels of carbon dioxide are currently increasing, causing the climate to warm—an effect that is predicted by at least one computer model of the greenhouse effect. But the warming that has occurred is a great deal less than what would be expected based on the model. Therefore, _______.

Which of the following most logically completes the scientist's argument?

A. better measurements of atmospheric levels of carbon dioxide are needed- incorrect, we can not conclusively say this. The reason for discrepancy might be somewhere else in the model
B. the definition of “greenhouse gas” should probably be reconsidered- irrelevant
C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate- Incorrect, even if there are other factors, it does not explain why the actual warming is a great deal less than our expectations based on the model. But if the option said, there are factors that cause global cooling and these factors have not been considered by the computer model, then it would be correct.
D. the computer model of the greenhouse effect must be incorrect in some respect- Correct, This has to be true because otherwise we should not have a significant difference in ACTUAL vs Model simulation value
E. the likely consequences of any warming of the climate are unlikely to be much less damaging than predicted- incorrect

Answer D
_________________
When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
Senior Manager
Senior Manager
avatar
G
Joined: 04 Sep 2017
Posts: 291
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 29 Sep 2019, 02:32
gmatt1476 wrote:
Scientist: A greenhouse gas, for example, carbon dioxide, forms a transparent layer that traps solar heat beneath it in the earth's atmosphere. Atmospheric levels of carbon dioxide are currently increasing, causing the climate to warm—an effect that is predicted by at least one computer model of the greenhouse effect. But the warming that has occurred is a great deal less than what would be expected based on the model. Therefore, _______.

Which of the following most logically completes the scientist's argument?

A. better measurements of atmospheric levels of carbon dioxide are needed
B. the definition of “greenhouse gas” should probably be reconsidered
C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
D. the computer model of the greenhouse effect must be incorrect in some respect
E. the likely consequences of any warming of the climate are unlikely to be much less damaging than predicted


CR51080.01


Official Explanation

Argument Construction

This question requires us to choose the option that most logically completes the scientist's argument.

The scientist's argument points out that at least one computer model has predicted that the amount of warming the atmosphere would by now have experienced as a result of the greenhouse effect would be significantly greater than what has actually occurred.

Because what precedes the blank is the word therefore, we must choose the statement that is most strongly supported by the information given.

A. It is reasonable to infer from the given information that some aspect of the computer model is incorrect in some way. One way that it might be incorrect is that the measurements of atmospheric levels of carbon dioxide used are inaccurate. Nevertheless, there is not sufficient information to infer that this is the specific flaw in the model.

B. The given information provides no reason for us to reconsider the definition of “greenhouse gas.” Perhaps there would be a reason to do so if no warming had occurred whatsoever. However, the information tells us that warming has in fact happened, just not as much as predicted.

C. If there are factors in addition to greenhouse-gas emissions that lead to atmospheric warming, then presumably temperatures would have risen more than predicted, not less.

D. Correct. If the model were correct, its predictions would be confirmed by the data regarding warming. However, this has not occurred. It is therefore reasonable to infer that, in some way, the computer model is incorrect.

E. This does not follow from the argument: given the findings, it seems more reasonable to think that the likely consequences of any atmospheric warming would in fact be less damaging than predicted.

The correct answer is D.
Manager
Manager
avatar
S
Joined: 29 Oct 2015
Posts: 233
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 17 Oct 2019, 16:29
VeritasKarishma GMATNinja GMATGuruNY
Can you please explain this question , specially why option C is incorrect and option D is correct ?
GMAT Club Verbal Expert
User avatar
S
Joined: 20 Nov 2016
Posts: 262
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 18 Oct 2019, 13:46
sayan640 wrote:
VeritasKarishma GMATNinja GMATGuruNY
Can you please explain this question , specially why option C is incorrect and option D is correct ?

Anything in particular that is giving you trouble here? The more specific you can make your question, the easier it is for us to help!
_________________
Senior Manager
Senior Manager
avatar
S
Joined: 17 Sep 2016
Posts: 310
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 20 Oct 2019, 23:58
gmatt1476 wrote:
Scientist: A greenhouse gas, for example, carbon dioxide, forms a transparent layer that traps solar heat beneath it in the earth's atmosphere. Atmospheric levels of carbon dioxide are currently increasing, causing the climate to warm—an effect that is predicted by at least one computer model of the greenhouse effect. But the warming that has occurred is a great deal less than what would be expected based on the model. Therefore, _______.

Which of the following most logically completes the scientist's argument?

A. better measurements of atmospheric levels of carbon dioxide are needed
B. the definition of “greenhouse gas” should probably be reconsidered
C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
D. the computer model of the greenhouse effect must be incorrect in some respect
E. the likely consequences of any warming of the climate are unlikely to be much less damaging than predicted


CR51080.01


dear VeritasKarishma, GMATNinja GMATGuruNY,
I struggled with C and D.

when I saw the word "therefore", I immediately though I should find a result according the reasoning of the stimulus.
so I picked up C, it seems logically because the model and expectation.

while OA is D, which used to explain the gap between the model and expectation.

please help how to figure what I need, explanation or result according "therefore."

thanks in advance.
have a nice day
Math Expert
avatar
V
Joined: 02 Aug 2009
Posts: 8182
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 21 Oct 2019, 00:26
gmatt1476 wrote:
Scientist: A greenhouse gas, for example, carbon dioxide, forms a transparent layer that traps solar heat beneath it in the earth's atmosphere. Atmospheric levels of carbon dioxide are currently increasing, causing the climate to warm—an effect that is predicted by at least one computer model of the greenhouse effect. But the warming that has occurred is a great deal less than what would be expected based on the model. Therefore, _______.

Which of the following most logically completes the scientist's argument?

A. better measurements of atmospheric levels of carbon dioxide are needed
B. the definition of “greenhouse gas” should probably be reconsidered
C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
D. the computer model of the greenhouse effect must be incorrect in some respect
E. the likely consequences of any warming of the climate are unlikely to be much less damaging than predicted


CR51080.01


The paragraph reasoning is..
Green house gas, such as carbon dioxide, makes a layer around atmosphere, a layer that does not allow the heat to move out, and, therefore, results in heating. Carbon dioxide levels have increased in recent past, resulting in further global warming. The warming has also been predicted by at least one computer model of the greenhouse effect. However, the warming expected as per the model has been relative less in actuals. Therefore...

We have to find the conclusion.
The conclusion should be able to bridge the gap between the observed warming and expected warming as per the model.

Since most are confused between C and D, let me touch on WHY not C and why D.

C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
If this were true, what would be the effect on this GAP. We would expect the GAP to be lesser as in actuals there are various factors contributing to the warming while the model is talking of warming based on just green house gas emissions.
If this choice does anything, it actually works opposite and complicates the situation further. Now the warming due to green house gas emissions would be even lesser as the observed warming is a result of various factors. Thus the GAP has become even more, while we were looking for a reason for this GAP.

D. the computer model of the greenhouse effect must be incorrect in some respect
Now this choice tells you that there has been some flaw in computer model and may be the reading are erroneously on higher side in the computer model.
Perfectly bridges the GAP. So, there is no GAP actually, it is just an error on part of the computer model


D
_________________
Senior Manager
Senior Manager
avatar
S
Joined: 17 Sep 2016
Posts: 310
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 21 Oct 2019, 00:47
chetan2u wrote:
gmatt1476 wrote:
Scientist: A greenhouse gas, for example, carbon dioxide, forms a transparent layer that traps solar heat beneath it in the earth's atmosphere. Atmospheric levels of carbon dioxide are currently increasing, causing the climate to warm—an effect that is predicted by at least one computer model of the greenhouse effect. But the warming that has occurred is a great deal less than what would be expected based on the model. Therefore, _______.

Which of the following most logically completes the scientist's argument?

A. better measurements of atmospheric levels of carbon dioxide are needed
B. the definition of “greenhouse gas” should probably be reconsidered
C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
D. the computer model of the greenhouse effect must be incorrect in some respect
E. the likely consequences of any warming of the climate are unlikely to be much less damaging than predicted


CR51080.01


The paragraph reasoning is..
Green house gas, such as carbon dioxide, makes a layer around atmosphere, a layer that does not allow the heat to move out, and, therefore, results in heating. Carbon dioxide levels have increased in recent past, resulting in further global warming. The warming has also been predicted by at least one computer model of the greenhouse effect. However, the warming expected as per the model has been relative less in actuals. Therefore...

We have to find the conclusion.
The conclusion should be able to bridge the gap between the observed warming and expected warming as per the model.

Since most are confused between C and D, let me touch on WHY not C and why D.

C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
If this were true, what would be the effect on this GAP. We would expect the GAP to be lesser as in actuals there are various factors contributing to the warming while the model is talking of warming based on just green house gas emissions.
If this choice does anything, it actually works opposite and complicates the situation further. Now the warming due to green house gas emissions would be even lesser as the observed warming is a result of various factors. Thus the GAP has become even more, while we were looking for a reason for this GAP.

D. the computer model of the greenhouse effect must be incorrect in some respect
Now this choice tells you that there has been some flaw in computer model and may be the reading are erroneously on higher side in the computer model.
Perfectly bridges the GAP. So, there is no GAP actually, it is just an error on part of the computer model


D


dear chetan2u, thanks for your help, but I genuinely want your help further

my reasoning here ,
#1 the observation is less than what expectation. in addition, not only one model gets these result. so if many model get the similar result, then the observation is not occasion. we have no reason to guess there are error on many model at the same period.
#2 I would like plug some numbers to express what I thought
expectation : 80,
observation : 50,
here is a gap: 30,
what caused the gap is other factors.

see, C matchs .
Math Expert
avatar
V
Joined: 02 Aug 2009
Posts: 8182
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 21 Oct 2019, 00:56
zoezhuyan wrote:
chetan2u wrote:
gmatt1476 wrote:
Scientist: A greenhouse gas, for example, carbon dioxide, forms a transparent layer that traps solar heat beneath it in the earth's atmosphere. Atmospheric levels of carbon dioxide are currently increasing, causing the climate to warm—an effect that is predicted by at least one computer model of the greenhouse effect. But the warming that has occurred is a great deal less than what would be expected based on the model. Therefore, _______.

Which of the following most logically completes the scientist's argument?

A. better measurements of atmospheric levels of carbon dioxide are needed
B. the definition of “greenhouse gas” should probably be reconsidered
C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
D. the computer model of the greenhouse effect must be incorrect in some respect
E. the likely consequences of any warming of the climate are unlikely to be much less damaging than predicted


CR51080.01


The paragraph reasoning is..
Green house gas, such as carbon dioxide, makes a layer around atmosphere, a layer that does not allow the heat to move out, and, therefore, results in heating. Carbon dioxide levels have increased in recent past, resulting in further global warming. The warming has also been predicted by at least one computer model of the greenhouse effect. However, the warming expected as per the model has been relative less in actuals. Therefore...

We have to find the conclusion.
The conclusion should be able to bridge the gap between the observed warming and expected warming as per the model.

Since most are confused between C and D, let me touch on WHY not C and why D.

C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
If this were true, what would be the effect on this GAP. We would expect the GAP to be lesser as in actuals there are various factors contributing to the warming while the model is talking of warming based on just green house gas emissions.
If this choice does anything, it actually works opposite and complicates the situation further. Now the warming due to green house gas emissions would be even lesser as the observed warming is a result of various factors. Thus the GAP has become even more, while we were looking for a reason for this GAP.

D. the computer model of the greenhouse effect must be incorrect in some respect
Now this choice tells you that there has been some flaw in computer model and may be the reading are erroneously on higher side in the computer model.
Perfectly bridges the GAP. So, there is no GAP actually, it is just an error on part of the computer model


D


dear chetan2u, thanks for your help, but I genuinely want your help further

my reasoning here ,
#1 the observation is less than what expectation. in addition, not only one model gets these result. so if many model get the similar result, then the observation is not occasion. we have no reason to guess there are error on many model at the same period.
#2 I would like plug some numbers to express what I thought
expectation : 80,
observation : 50,
here is a gap: 30,
what caused the gap is other factors.

see, C matchs .



First point on various models..
The observation being spoken about is from just one model. Nowhere it speaks of models, it speaks of at least ONE model, so it could be one or more, and thereafter the argument talks of that MODEL.
Secondly
Expectations from green house emissions = 80
Actual observed =50
Argument says there are other factors that are increasing the warming ( Actual warming ), day 30
This means 50 includes this 30, so observed warming from green house emissions =50-30=20
GAP has further increased to 80-20=60
_________________
Senior Manager
Senior Manager
avatar
S
Joined: 17 Sep 2016
Posts: 310
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran  [#permalink]

Show Tags

New post 21 Oct 2019, 04:26
chetan2u wrote:
First point on various models..
The observation being spoken about is from just one model. Nowhere it speaks of models, it speaks of at least ONE model, so it could be one or more, and thereafter the argument talks of that MODEL.
Secondly
Expectations from green house emissions = 80
Actual observed =50
Argument says there are other factors that are increasing the warming ( Actual warming ), day 30
This means 50 includes this 30, so observed warming from green house emissions =50-30=20
GAP has further increased to 80-20=60


thanks ,I got it.

definitely helpful.
GMAT Club Bot
Re: Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran   [#permalink] 21 Oct 2019, 04:26
Display posts from previous: Sort by

Scientist: A greenhouse gas, for example, carbon dioxide, forms a tran

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





cron

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