PrepTest 150, Section 1, Question 3
The following passage was written in the mid-1990s.(446 more words not shown)
Which one of the following(5 more words not shown)
- Athe way in(11 more words not shown)
- Bthat airborne sulfates(5 more words not shown)
- Cthe usual duration(8 more words not shown)
- Dpredictions as to(8 more words not shown)
- Ean example of(6 more words not shown)
Reading the passage
This is a check for something actually stated. We know sulfates, solar cycles, and glacial ice all appear, but mentioning a subject doesn't establish every claim an answer might make about it. Check the specific fact each choice asks us to find.
Working the answers
- ACorrect
Sulfates counteract warming by redirecting sunlight outward from Earth (paragraph 2). That gives the mechanism, not just the fact that sulfates affect temperature.
- B
Sulfates are distinguished from the greenhouse gases and counteract their heating effect. They are not identified as the main greenhouse gases.
- C
Solar cycles are mentioned, but their usual duration is not supplied. A decade-by-decade comparison is not a statement that a cycle lasts a decade.
- D
Glacial ice supplies evidence about past sulfate levels. The author does not predict what warming will do to that ice. Using ice as evidence is different from predicting its future.
- E
Volcanoes provide a natural-source example. Human technological sources are mentioned without a specific example. Cars or factories might come to mind, but neither is named here.
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