What is the average forward speed of a hurricane (how fast does it approach the coast)?
a. about 5 km/hour
b. about 25 km/hour
c. about 100 km/hour
d. ?about 200 km/hour
e. ?about 500 km/hour
ANSWER: b
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A. paleomagnetic analysis of the ocean's floor. B. geological, biological, and climatological data. C. the change in Earth's polarity. D. none of the above
The ____________________ fish are represented today by sharks, rays, and skates. Fill in the blank(s) with the appropriate word(s)
Which of the following statements is an expression of climate?
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The single most effective agent of chemical weathering at Earth's surface is
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