All correct in 9 mins 30 seconds, including a little more than 4 mins to read
Para 1- severity of the drought in sub-Sahara- sign of long-term alteration in climate, cooling hypothesis
Para 2- cooling hypothesis, growing temperature differential -> southward expansion of the circumpolar vortex --> displaces northward-moving monsoon
Para 3- contra findings to cooling hypothesis
1. Which one of the following best expresses the main idea of the passage?(B) The suggestion that Northern Hemisphere cooling is contributing to a decline of rainfall in sub-Saharan West Africa is open to question.- Correct
2. The author’s attitude toward the cooling hypothesis is best described as one of(A) vehement opposition- incorrect, the author does not oppose the hypothesis
(B) cautious skepticism
(C) growing ambivalence
(D) guarded enthusiasm- incorrect
(E) strong support- incorrect, the author also provides contra findings that suggest the hypothesis might not be true
Although I chose the correct answer, I was in a fix between options B and C.I understand that the author is skeptical of the cooling hypothesis and presents findings that make us question the hypothesis.
Can't we also consider the author's attitude as ambivalent?
AjiteshArun ,
GMATNinja ,
MagooshExpert ,
GMATGuruNY ,
VeritasPrepBrian ,
MartyTargetTestPrep ,
DmitryFarber ,
VeritasKarishma ,
generis ,
jennpt ,
VeritasPrepErika , other experts - please enlighten
3. According to the passage, proponents of the cooling hypothesis suggested that the circumpolar vortex is likely to expand when which one of the following occurs?(D) There is a significant increase in the difference between the average annual atmospheric temperature of the tropics and that of the more northern latitudes.
supporters of the cooling hypothesis have argued that a growing temperature differential between the unusually cool middle and high latitudes and the warm tropical latitudes is causing
a southward expansion of the circumpolar vortex
4. Which one of the following can be inferred from the passage about the average annual temperature of the air over Northern Hemisphere landmasses before 1945?(A) It was higher than it was between 1945 and the early 1970s.
between 1945 and the early 1970s, the average annual air temperatures over the landmasses of the Northern Hemisphere decreased by about half a degree Fahrenheit
5. Which one of the following best describes the organization of the passage?(A) Opposing points of view are presented, evidence supporting each point of view is discussed, and then one point of view is developed into a formal hypothesis.- incorrect, no point of view is developed into a formal hypothesis
(B) A theory is discussed, and different points of view about the theory are discussed, supported, and then reconciled.- incorrect, there is no reconciliation between different views
(C) A hypothesis is proposed, contradictory evidence is discussed, and then the hypothesis is amended.- incorrect, there is no amendment to the hypothesis
(D) A theory explaining a phenomenon is proposed, supporting evidence is considered, and then the theory is disputed.- correct
(E) A point of view is presented, a theory supporting the view is proposed, contradictory evidence is presented, and then a different theory is proposed.- incorrect, no different theory is proposed
6. A proponent of the cooling hypothesis would most likely argue that the return of the monsoon rains to sub-Saharan West Africa would indicate that which one of the following has also occurred?(A) The amount of ice and snow coverage over the landmasses of the Northern Hemisphere has increased.- incorrect, Opposite this will intensify the drought in sub-Sahara
(B) The average annual temperature of the atmosphere over the middle and high latitudes of the Northern Hemisphere has decreased.- incorrect, Opposite this will intensify the drought in sub-Sahara
(C) The average annual temperature of the atmosphere over the tropics in the Northern Hemisphere has increased.- incorrect, Opposite this will intensify the drought in sub-Sahara
(D) Other components of large-scale atmospheric circulation, besides the circumpolar vortex, have expanded and moved southward.- irrelevant, at worst it is in the opposite direction
(E) The atmospheric circulation pattern of the high-altitude westerly winds has resumed its normal pattern.- Correct