The huge dust storms that took place in the U.S. Midwest in the 1930s ________
A) were the result of polar cells
B) were the result of poor farming and grazing techniques
C) were the result of ozone depletion
D) were the result of glacier melt
E) were triggered by tornados, worsened by global climate change
B
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What does a Benioff-Wadati zone refer to?
a. an area of extensional stress b. a subduction zone c. a transform plate boundary d. an area of high heat flow e. an area lacking deep earthquakes
What are believed to be the causes of global transgressive and regressive cycles?
Which revolution is most responsible for the shift from phase I to phase II in the process of demographic transition?
A) The Industrial Revolution B) The Green Revolution C) The Neolithic Revolution D) The Medical Revolution
The slippage or displacement of rocks along a fracture surface is ____
a. jointing b. plutonism c. relief d. faulting e. folding