Plumes form ________ that are related to areas of active volcanism such as Iceland, Yellowstone and Hawaii.
A. hot spots
B. aseismic ridges
C. converging plate boundaries
D. failed rifts
E. trenches
Answer: A
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Greenhouse gases in the atmosphere
A. have decreased over the past fifty years. B. prevent sunlight from reaching Earth's surface. C. trap outgoing heat radiated by Earth's surface. D. All of the choices are correct.
One of the unusual aspects of European imperialism was that the European countries always recognized the national rights of their colonial subjects
Indicate whether the statement is true or false.
Natural processes, especially windblown sand, rapidly repair damage to the desert caused by offhighway
vehicles. Indicate whether the statement is true or false.
According to your text, what percent of U.S. carbon dioxide emissions come from automobiles?
a) 10% b) 20% c) 32% d) 62%