With respect to the U.S. transportation system, what best explains why electric motors are considered as the most sustainable means of running cars and trains in the future?
A. conventional crude oil will soon be in short supply
B. internal combustion engines are too inefficient for the expected growth in population
C. electricity generated by nuclear power is expected to become significantly less expensive
D. fuels for internal combustion engines all produce greenhouse gases
E. reserves of non-conventional fossil fuel are relatively small
Answer: D
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Which of the following is true of midlatitude cyclones the Northern Hemisphere?
A) These pressure systems have converging, ascending air that spirals counterclockwise and inward. B) The winds diverge from the pressure system and spiral outward in a clockwise fashion. C) They form only a minor weather pattern in the middle and higher latitudes. D) These pressure systems tend to move east to west along storm tracks. E) They are also known as tropical cyclones.
An elongated area of low pressure is called a(n) ____________________
Fill in the blank with correct word.
The increased elevation of some areas of Scandinavia is the result of
a. outwash. d. the Little Ice Age. b. glacial rebound. e. varve. c. the Milankovitch Theory.
The Industrial Revolution first took hold in the United States in the South
Indicate whether the statement is true or false