Which of the following energy sources makes up the largest percentage of the electricity produced in the U.S.?
A. oil
B. natural gas
C. renewables
D. nuclear
E. coal
Answer: E
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During the last glaciations, what were the moisture conditions like?
A) very wet B) the same as today C) a little drier D) more than 50% drier in the northern latitudes
What do we know about the main volcanoes in the Cascade Range?
A. Only Mount St. Helens and Crater Lake have erupted in the last 4,000 years. B. Nearly all of the large Cascade volcanoes have erupted in the last 4,000 years. C. Only Mount St. Helens has erupted in the last 4,000 years. D. Only Mount St. Helens and Mount Shasta in California have erupted in the last 4,000 years.
Why is humid air less dense than dry air?
a. Molecular movement of water vapor occupies less space than dry air. b. Molecular movement of water vapor occupies more space than dry air. c. Water vapor molecules are more compressed than dry air molecules. d. Molecules of water vapor have less mass than the displaced nitrogen and oxygen. e. Molecules of water vapor have more mass than the displaced nitrogen and oxygen.
Which of the following factors is depicted by streamlines on a weather map?
A. dew point B. wind flow C. pressure D. water temperature