The shaded areas on this map have significant earthquake risks because
A. the area is over a subduction zone.
B. stress generated on far-off plate boundaries can reactivate ancient faults.
C. the area is near an active plate boundary.
D. there are many active strike-slip faults.
Answer: B
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An important principle in the electrification of a cumulonimbus cloud is that:a
raindrops are always positively charged b. supercooled water is always negatively charged c. ice crystals are always negatively charged d. there is a net transfer of positive ions from a warmer object to a colder object
Which of the following materials would cause the greatest gravity anomaly?
A) Quartz B) Water C) Granite D) Metallic ore
On this map of South America and adjacent areas, which site would have earthquakes along a subduction zone?
A) 1, the oceanic trench
B) 2, below the magmatic belt
C) 3, along a passive margin
D) 4, in the middle of the Atlantic Ocean
E) Both 1 and 2.
The diagram below shows the record of one earthquake on seismograms at three different stations in a seismic network. These three seismograms show
A. WUAZ is the closest station, followed by DUG, and then ISCO. B. WUAZ station was right at the earthquake. C. DUG station is farthest from the earthquake. D. ISCO station is closest to the earthquake. E. None of these choices are correct.