Your kid brother predicts that another earthquake will occur in the San Francisco area. Is his prediction likely to come true?
A. Yes, because earthquakes always occur in clusters.
B. Yes, because San Francisco hasn't had a big earthquake since 1906.
C. Yes, because there is a hot spot under San Francisco.
D. Yes, because a tectonic plate boundary runs through the San Francisco area.
Answer: D
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What happens when river slopes are uplifted beyond their maximum stable slope?
A) They are usually returned to the maximum stable slope by landslides. B) They are usually returned to the maximum stable angle by erosion. C) They usually remain at the uplifted angle but are more unstable when earthquakes occur. D) The river water fills the deeper crevice and maintains that depth.
Higher-mass rocks will have a shorter runout than smaller rocks
a. True b. False
The lowest level to which a stream can erode is its
A. base level. B. bedrock. C. sediment capacity. D. headwaters.
Birth rate would tend to decrease with a
A. Decrease in education B. Decrease in average marrying age C. Decrease in sanitation D. Decrease in infant mortality rate E. Decrease in affluence