According to the elastic rebound theory, an earthquake occurs when a rock
A. expands due to excessive heat.
B. reaches its elastic limit.
C. contracts due to excessive heat.
D. recrystallizes due to high pressure.
Answer: B
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Geologists have shown that the east coast of the United States faces a serious tsunami threat from ________.
A. large earthquakes offshore of Portugal B. landslides along the White Cliffs of Dover C. meteor impact in the Mediterranean Sea D. breakup of Antarctic ice shelves E. volcanic flank collapse in the Canary Islands
As a result of the Coriolis effect in the northern hemisphere, winds always are deflected ________
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Oceans are becoming more acidic because they are absorbing ________
A) lye B) hydrochloric acid C) carbon dioxide D) smoke E) rocks