The southern desert region of North America is dry because it is dominated by the ____________________ most of the year
Fill in the blank with correct word.
ANSWER: subtropical high?
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You are a field geologist, dropped off in a new area. You examine the rocks of this area and find rhyolite, welded tuff, and scattered pumice
All are very young. You begin mapping the area, and soon have a rough sense of the distribution of rock units, as shown here: Note that the welded tuff varies systematically in its thickness, and that a lake is present near the center of your mapping area. How do you interpret this pattern? What will be an ideal response?
What is the relationship between density and specific gravity?
A) They both have the same definition. B) They both represent the same dimensional units. C) They can have the same numerical value. D) They both measure substances in the same way.
About what percentage of Earth's land surface was covered by glaciers during the Quaternary period?
A) 3%. B) 15%. C) 30%. D) 55%.
Corn-produced ethanol ________
A) does not require inputs of fossil fuel energy B) does not produce greenhouse gases when burned C) results in higher food prices for corn and corn products D) yields more than 10x the energy required to produce it E) cannot be mixed with other fuels