Rocks are classified according to their
A. Chemical composition
B. Mode of formation
C. Physical properties
D. Internal structure
E. All of these are correct
Answer: E
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Which two key geologic phenomena are associated with the process of subduction?
A. Hurricanes and flooding B. Tsunamis and landslides C. Earthquakes and volcanoes D. Global warming and sea level rise
Water use for irrigation in the region of the Aral Sea has resulted in
A. health problems from blowing toxic dust. B. decreased water salinity. C. increased crop yields because of nutrient salts deposited on fields. D. All of the choices are correct.
An erosional coast that has little tidal variation:a
can erode quickly because wave action is centralized. b. can erode slowly because there are no dramatic changes in tide. c. can erode quickly because it is inundated with large waves. d. can erode slowly because it becomes protected from large tidal variations.
Severe thunderstorms
A) have, by definition, wind speeds in excess of 90 miles per hour. B) often appear in groups. C) typically take place on the microscale. D) rarely last more than an hour.