The word marked in the passage is closest in meaning to
A. signed.
B. clear.
C. rapid.
D. special.
查看答案
Which of the sentences below best expresses the essential information in the highlighted sentence in the passage？ Incorrect choices change the meaning in important ways or leave out essential information.
A. Eroded sediments from rocks at the surface would be slowly transported to the depths of the ocean, where intense heat would change their physical structure.
B. Rocks brought to the surface by volcanoes were eroded, carried as sediments to the seafloor, and then formed into rocks to begin the cycle anew.
C. Erosion was the driving force behind this rock cycle, for without it, there would be no fresh sediments to form. new rocks.
D. The immense power released during periods of volcanic activity resulted in the movement of rocks from great depths up to the surface.
The word avenues in the passage is closest in meaning to
A. inventions.
B. channels.
C. approaches.
D. formats.
Why does the author mention plate tectonics and radiocarbon dating in Paragraph 6？
A. To identify some of James Hutton's other innovations.
B. To support the claim that Catastrophism was replaced by Uniformitarianism.
C. To prove that many of Plutonism's ideas were incorrect.
D. To explain how Hutton's theories have influenced modern geology.
The word catalyst in the passage is closest in meaning to
A. source.
B. instrument.
C. obstacle.
D. stimulus.
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