Approximately how much energy was released in the Mexico City earthquake in 1980?

A) 56,000,000,000,000 kg worth of explosives
B) 1,800,000,000,000 kg worth of explosives
C) 1,800,000,000 kg worth of explosives
D) 56,000 kg worth of explosives


Answer: B

Environmental & Atmospheric Sciences

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A stream channel has a cross-sectional area of 20 square meters (20 m2). The stream's velocity at that point is 4 meters per second (4 m/s). Calculate the stream's discharge.

A. 150 m3/s B. 15 m3/s C. 80 m3/s D. 40 m3/s

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The part of China that is experiencing the greatest economic growth is

A. the coast B. the inland areas C. the mountains D. the Northeast

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Pedalfer soils are found in

A. dry climates. B. humid climates. C. cold climates. D. hot climates.

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If you were a land planner, what questions could you answer by using the composite overlay of data layers in Figure 30.1?

What will be an ideal response?

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