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18 Feb 2020, 05:03
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Some people fear that global warming will cause the large ice formations in the polar seas to melt, thereby warming the water of those seas and threatening the plankton that is crucial to the marine food chain. Some scientists contend that it is unlikely that the melting process has begun, since water temperatures in the polar seas are the same today as they were a century ago.
Which one of the following, if true, most seriously undermines the scientists’ contention?
(A) Much of the marine plant life that flourished in the polar seas will die in the event that the water temperatures rise above their present levels.
(B) The overall effect of the melting process will be an increase in global sea levels.
(C) The mean air temperature above both land and water in the polar regions has not varied significantly over the past 100 years.
(D) The temperature of water that contains melting ice tends to remain constant until all of the ice in the ice-and-water mixture has melted.
(E) The mean temperature of ocean waters near the equator has remained constant over the past 100 years.
Which one of the following, if true, most seriously undermines the scientists’ contention?
(A) Much of the marine plant life that flourished in the polar seas will die in the event that the water temperatures rise above their present levels.
(B) The overall effect of the melting process will be an increase in global sea levels.
(C) The mean air temperature above both land and water in the polar regions has not varied significantly over the past 100 years.
(D) The temperature of water that contains melting ice tends to remain constant until all of the ice in the ice-and-water mixture has melted.
(E) The mean temperature of ocean waters near the equator has remained constant over the past 100 years.
18 Feb 2020, 10:36
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Which one of the following, if true, most seriously undermines the scientists’ contention?
Let us first analyze:
Scientists' contention: It is unlikely that the melting process has begun since water temperatures in the polar seas are the same today as they were a century ago.
Now to weaken the argument/contention we need to attack the assumption. The assumption here is that the water temperature of polar seas is not increased hence ice melting has not begun yet.
(A) Much of the marine plant life that flourished in the polar seas will die in the event that the water temperatures rise above their present levels. - Irrelevant
(B) The overall effect of the melting process will be an increase in global sea levels.
- Trap answer. It might be true but it does not necessarily weaken the scientists' contention.
(C) The mean air temperature above both land and water in the polar regions has not varied significantly over the past 100 years. -Irrelevant
(D) The temperature of water that contains melting ice tends to remain constant until all of the ice in the ice-and-water mixture has melted. - Answer, as it is directly attacking the scientists' contention.
(E) The mean temperature of ocean waters near the equator has remained constant over the past 100 years. -Irrelevant
Correct answer: D
Let us first analyze:
Scientists' contention: It is unlikely that the melting process has begun since water temperatures in the polar seas are the same today as they were a century ago.
Now to weaken the argument/contention we need to attack the assumption. The assumption here is that the water temperature of polar seas is not increased hence ice melting has not begun yet.
(A) Much of the marine plant life that flourished in the polar seas will die in the event that the water temperatures rise above their present levels. - Irrelevant
(B) The overall effect of the melting process will be an increase in global sea levels.
- Trap answer. It might be true but it does not necessarily weaken the scientists' contention.
(C) The mean air temperature above both land and water in the polar regions has not varied significantly over the past 100 years. -Irrelevant
(D) The temperature of water that contains melting ice tends to remain constant until all of the ice in the ice-and-water mixture has melted. - Answer, as it is directly attacking the scientists' contention.
(E) The mean temperature of ocean waters near the equator has remained constant over the past 100 years. -Irrelevant
Correct answer: D
KeyurJoshi
09 Nov 2020, 02:43
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Conclusion: water temperatures in the polar seas are the same today as they were a century ago, so melting process hasnt begun.
A. Marine plant life will die - Doesnt affect the conclusion
B. Increase in sea levels - Irrelevant
C. Mean AIR TEMPERATURE - we are talking about WATER TEMPERATURES. Eliminate.
D. D basically says that water temperatures dont change even if the melting has begun i.e.
There is NO coorelation between melting of ice and water temperatures in polar seas
E. Temperature near equator - Irrelevant
A. Marine plant life will die - Doesnt affect the conclusion
B. Increase in sea levels - Irrelevant
C. Mean AIR TEMPERATURE - we are talking about WATER TEMPERATURES. Eliminate.
D. D basically says that water temperatures dont change even if the melting has begun i.e.
There is NO coorelation between melting of ice and water temperatures in polar seas
E. Temperature near equator - Irrelevant
