A typical rate of plate motion is
A. 1,000 kilometers per year
B. 1-10 centimeters per year
C. 3-4 meters per year
D. 1 kilometer per year
Answer: B
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A meltdown of the reactor core would occur if
A. control rods were inserted into the core. B. too much coolant was lost. C. the proportion of uranium-238 was too high. D. the containment building developed an air leak. E. the containment shell was too thick.
Southeast Asian countries
A. are more interested in developing trade with East Asian than with Australia. B. have taken the lead in courting trade relations with Australia. C. proposed inviting Australia and New Zealand to join ASEAN. D. are not members of APEC.
One of the most important techniques for surveying and mapping the seafloor came out of submarine warfare in World War II. It was _____.
A ) echo sounding B ) depth charges C ) seismology D ) deep ocean drilling
In the Cambrian, the major event for the North American continent was
A. Shallow Sea Transgression and Regression B. Eastern and Western Orogenic Activity C. Volcanic Activity D. Emplacement of plutons along the southern margin