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Updated on: 28 Jul 2019, 07:16
Originally posted by Gauss on 19 Jul 2006, 03:08.
Last edited by Sajjad1994 on 28 Jul 2019, 07:16, edited 8 times in total.
Last edited by Sajjad1994 on 28 Jul 2019, 07:16, edited 8 times in total.
Updated complete topic (19).
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Question 1
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
63% (02:43) correct
37%
(02:54) wrong
based on 4586
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
73% (00:44) correct 27%
(00:58) wrong
based on 4428
sessions
History
Date
Time
Result
Not Attempted Yet
Question 3
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
65% (01:08) correct 35%
(01:28) wrong
based on 4361
sessions
History
Date
Time
Result
Not Attempted Yet
Question 4
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
79% (00:39) correct 21%
(01:00) wrong
based on 3060
sessions
History
Date
Time
Result
Not Attempted Yet
Source : GMATPrep Default Exam Pack
2. The passage is primarily concerned with
(A) evaluating a method used to test a particular scientific hypothesis
(B) discussing explanations for an unexpected scientific finding
(C) examining the assumptions underlying a particular experiment
(D) questioning the validity of a scientific finding
(E) presenting evidence to support a recent scientific hypothesis
3. The passage mostly agree that Henyey’s findings about temperature in the San Andreas Fault made the greatest contribution in that they
(A) revealed an error in previous measurements of temperature in the San Andreas Fault zone
(B) indicated the types of clay present in the rocks that form the San Andreas Fault
(C) established the superiority of a particular technique for evaluating data concerning friction in the San Andreas Fault
(D) suggested that geologists had inaccurately assumed that giant rock plates that meet at the San Andreas Fault generate heat through friction
(E) confirmed geologists’ assumptions about the amount of friction generated by common varieties of rocks, such as limestone and granite
4. According to the passage, Henyey's findings in 1965 were significant because they
(A) revealed an error in previous measurements of temperature in the San Andreas Fault zone
(B) indicated the types of clay present in the rocks that form the San Andreas Fault
(C) established the superiority of a particular technique for evaluating data concerning friction in the San Andreas Fault
(D) suggested that geologists had inaccurately assumed that giant rock plates that meet at the San Andreas Fault generate heat through friction
(E) confirmed geologists' assumptions about the amount of friction generated by common varieties of rocks, such as limestone and granite
Prior to 1965 geologists assumed that the two giant rock plates meeting at the San Andreas Fault generate heat through friction as they grind past each other, but in 1965 Henyey found that temperatures in drill holes near the fault were not as elevated as had been expected. Some geologists wondered whether the absence of friction-generated heat could be explained by the kinds of rock composing the fault. Geologists’ pre-1965 assumptions concerning heat generated in the fault were based on calculations about common varieties of rocks, such as limestone and granite; but “weaker” materials, such as clays, had already been identified in samples retrieved from the fault zone. Under normal conditions, rocks composed of clay produce far less friction than do other rock types.
In 1992 Byerlee tested whether these materials would produce friction 10 to 15 kilometers below the Earth’s surface. Byerlee found that when clay samples were subjected to the thousands of atmospheres of pressure they would encounter deep inside the Earth, they produced as much friction as was produced by other rock types. The harder rocks push against each other, the hotter they become; in other words, pressure itself, not only the rocks’ properties, affects frictional heating. Geologists therefore wondered whether the friction between the plates was being reduced by pockets of pressurized water within the fault that push the plates away from each other
In 1992 Byerlee tested whether these materials would produce friction 10 to 15 kilometers below the Earth’s surface. Byerlee found that when clay samples were subjected to the thousands of atmospheres of pressure they would encounter deep inside the Earth, they produced as much friction as was produced by other rock types. The harder rocks push against each other, the hotter they become; in other words, pressure itself, not only the rocks’ properties, affects frictional heating. Geologists therefore wondered whether the friction between the plates was being reduced by pockets of pressurized water within the fault that push the plates away from each other
1. The passage suggests which of the following regarding Henyey’s findings about temperature in the San Andreas Fault?
(A) Scientists have yet to formulate a definitive explanation for Henyey’s findings.
(B) Recent research suggests that Henyey’s explanation for the findings should be modified.
(C) Henyey’s findings had to be recalculated in light of Byerlee’s 1992 experiment.
(D) Henyey’s findings provided support for an assumption long held by geologists.
(E) Scientists have been unable to duplicate Henyey’s findings using more recent experimental methods.
(A) Scientists have yet to formulate a definitive explanation for Henyey’s findings.
(B) Recent research suggests that Henyey’s explanation for the findings should be modified.
(C) Henyey’s findings had to be recalculated in light of Byerlee’s 1992 experiment.
(D) Henyey’s findings provided support for an assumption long held by geologists.
(E) Scientists have been unable to duplicate Henyey’s findings using more recent experimental methods.
2. The passage is primarily concerned with
(A) evaluating a method used to test a particular scientific hypothesis
(B) discussing explanations for an unexpected scientific finding
(C) examining the assumptions underlying a particular experiment
(D) questioning the validity of a scientific finding
(E) presenting evidence to support a recent scientific hypothesis
3. The passage mostly agree that Henyey’s findings about temperature in the San Andreas Fault made the greatest contribution in that they
(A) revealed an error in previous measurements of temperature in the San Andreas Fault zone
(B) indicated the types of clay present in the rocks that form the San Andreas Fault
(C) established the superiority of a particular technique for evaluating data concerning friction in the San Andreas Fault
(D) suggested that geologists had inaccurately assumed that giant rock plates that meet at the San Andreas Fault generate heat through friction
(E) confirmed geologists’ assumptions about the amount of friction generated by common varieties of rocks, such as limestone and granite
4. According to the passage, Henyey's findings in 1965 were significant because they
(A) revealed an error in previous measurements of temperature in the San Andreas Fault zone
(B) indicated the types of clay present in the rocks that form the San Andreas Fault
(C) established the superiority of a particular technique for evaluating data concerning friction in the San Andreas Fault
(D) suggested that geologists had inaccurately assumed that giant rock plates that meet at the San Andreas Fault generate heat through friction
(E) confirmed geologists' assumptions about the amount of friction generated by common varieties of rocks, such as limestone and granite
10 Dec 2013, 11:04
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sahilchaudhary
Dissect the argument and boile it down to a simple scheme
Now the first sentence says: basically the scientists think that the heat among the earth's plates is caused by the friction of the rocks.
BUT in 1965 Henyey found that temperatures in drill holes near the fault were not as elevated as had been expected.. So after this something is weird: could not be this the real reason behind the friction and the consequent heat. Maybe is the type or quality of the rocks or clay or whatever else.
Byerlee's experiment instead says just this: no matter what is the type of rock, they genarate heat.
BUT pressure itself, not only the rocks’ properties, affects frictional heating. Geologists therefore wondered whether the friction between the plates was being reduced by pockets of pressurized water within the fault that push the plates away from each other.
Basically this is the skeleton of the argument that you have to keep in mind to answer the question. (indeed quite tricky) just because pressure + rock's properties could be the cause of all this but we are still wondering why Is this or there is something else that we do not know ??'
A fits the bill
hope this helps
plumber250
Joined: 07 Nov 2012
Last visit: 21 Dec 2015
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17 Jan 2013, 11:04
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Hi Roopika,
I don't think that it does.
Whilst Heyney found that temperatures were not that high, it says nowhere that anyone else had measured the temparature. The previous wisdom that temperatures were high, was not based on any actual data, just an assumption.
So A is not correct.
Hope that helps.
James
I don't think that it does.
Whilst Heyney found that temperatures were not that high, it says nowhere that anyone else had measured the temparature. The previous wisdom that temperatures were high, was not based on any actual data, just an assumption.
So A is not correct.
Hope that helps.
James
Failed to get it correct even after taking 2 mins .
