Which of the following is true about alternative energy sources?
A. Comparatively cheap
B. More energy dense
C. Highly concentrated
D. Intermittent in nature
Answer: D
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China plans to lead the world in relying on renewable energy resources
Indicate whether the statement is true or false
Europe was the battleground for which wars during the 20th century?
A) World War I, but not World War II B) World War I and World War II, but not the Cold War C) World War I and the Cold War, but not World War II D) World War II, but not World War I E) World War I, World War II, and the Cold War
What comprises a comet?
A. ice B. rock C. both ice and rock
According to the three-cell general circulation model, the driest regions on Earth should be found near:
a. The equator and 60 deg latitude. b. The equator and 30 deg latitude. c. 30 deg latitude and the polar regions. d. 30 deg latitude and 60 deg latitude.