Continental polar air masses that affect North America
A) usually form over the United States.
B) provide the moisture for much of the precipitation of the eastern United States.
C) are typically unstable.
D) always form over snow-covered regions.
E) none of the above
E
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When a donkey mates with a horse, a mule is produced. However, mules are sterile. This is an example of
A. speciation by hybridization. B. allopatric speciation. C. sympatric speciation. D. a postzygotic reproductive barrier.
Which type of breaker has a longer life span and give surfers a longer ride than other breakers?
A) Plunging breaker B) Spilling breaker C) Standing breaker D) Surging breaker E) Swelling breaker
Which of the following statements is the best description of the per capita generation of solid waste between 1960 and 2010?
A. Between 1960 and 2010, per capita generation of solid waste increased steadily. B. Between 1960 and 2000, per capita generation increased. After 2000, per capita generation declined. C. Between 1960 and 2010, per capita generation was relatively constant. D. Between 1960 and 1990, per capita generation increased at a steady rate. After 1990, per capita generation continued to increase, but at a slower rate.
Why is the geologic history of a volcano important in hazard prediction?
A) The geologic history helps to determine whether evacuation is necessary. B) The geologic history reflects the history of subduction beneath a volcano. C) The geologic history is an important indicator of seismic activity. D) The geologic history reveals the frequency and style of eruptions.