The Great Plains region of the Central United States plays host to about ________ percent of the tornadoes that occur on Earth.
A. 25
B. 95
C. 70
D. 50
E. 10
Answer: C
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A) straddle both land and water. B) be extensive. C) have varied topography of mountains and plains. D) have moderate to strong winds. E) all of the above
Hydrogen fuel cells power automobiles by ________
A) generating changes in gas pressures that move pistons in car engines B) generating electricity C) combining with equal parts of gasoline to create a fuel with extra octane D) creating rapidly combustible hydrogen compounds
How may sewage from individual homes be handled in the absence of municipal collection systems? What are some of the problems with these on-site systems?
What will be an ideal response?
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A) The middle of North America B) The middle of the Atlantic Ocean C) The middle of the Arctic Ocean D) Along the Aleutian Trench E) Along the Hawaiian Islands