This figure shows plate boundaries south of Alaska. Which location is likely to contain volcanoes above a subduction zone?
A. 1
B. 2
C. 3
D. 4
E. 2 and 3
Answer: A
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Which of the following reactions illustrates an amphoteric compound?
A) 2 HF ? H2F+ + F- B) NaOH + HBr ? NaBr + H2O C) 2 H2 + O2 ? 2 H2O D) All are amphoteric. E) none of the above
Oil shale deposits ________
A) have been too expensive to extract and use as energy resources B) contain organic kerogen which can be processed into petroleum C) can be pumped from underground reservoirs like conventional crude oil D) are only a tiny fraction of the U.S. and Canadian potential oil reserves E) are concentrated in the Middle East
What is a possible way to decrease permeability?
A. Fill pores with natural cement. B. Seal fractures with clays and other minerals. C. Fill pores between grains with clays and other fine-grained materials. D. All of these choices are correct. E. None of these choices are correct.
The origin of dust devils would be most similar to
A. microbursts. B. tornadoes. C. haboobs. D. virgas.