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- GRE - Reading Comprehension - Test 23
GRE - Reading Comprehension - Test 23
Read the passage and choose the option that best answer each question.
The mystery of cloud formation is as ancient as mankind. Throughout history, man prayed for rain and feared snow and lightning. Only in the last few decades, was man able to experiment and answer many questions as to how clouds are formed. Lately, it has seemed that no almost queries were left in that field. However, a recent look at old experimental data is threatening to overturn a longstanding theory about how water droplets freeze within clouds . Suspended water droplets can remain liquid even at temperatures far below the normal freezing point. Data collected in recent years show that clouds as cold as ?
1. According to the passage, if a given volume of water is divided into a large number of small droplets, as opposed to a smaller number or large droplets, it will freeze quicker. This indicates that
A. a given volume of water yields more droplets when below freezingB. a given volume of water yields more droplets when above freezing
C. freezing begins simultaneously both at the cores and at the surface of the drops
D. freezing begins not at the surface of the drops, but at the cores
E. freezing begins not at the cores of the drops, but at the surface
2. According to the passage, all of the following are characteristic of cloud droplets EXCEPT
A. they periodically bump into each otherB. the time needed to freeze a given volume of water dispersed into a fine mist is dependent on the size of the individual droplets
C. can remain liquid even at temperatures far below the normal freezing point
D. they are only partly understood by scientists
E. they appear in the same amount in clouds involved in various meteorological phenomena
3. The passage suggests that many questions in the field of meteorology
A. have been answeredB. have no answers
C. have yet to be answered
D. have been answered incorrectly
E. are uninteresting to scientists today
4. The primary purpose of the passage is to
A. present several explanations for a well-known factB. argue in favor of a long-standing theory
C. discuss the implications of a new research finding
D. present new evidence that overturns a long-standing theory
E. question the methodology used in a study.
