The North American population cluster is much like the European region in that much of the population is concentrated:
A. in rural areas
B. in river valleys
C. in mountain valleys
D. in several major cities
E. in arable, agricultural areas
Answer: D. in several major cities
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The Chicxulub impact crater was the first evidence to suggest that a meteorite impact caused the Cretaceous-Tertiary mass extinction
Indicate whether the statement is true or false
The EPA regulates the demolition and renovation of older buildings because they may contain ________
A) hydrocarbons B) VOCs C) asbestos D) radon E) plywood
The High Plains aquifer irrigates about one-fifth of all U.S. cropland
Indicate whether the statement is true or false
As air in the figure above moves from A to B, what will happen to its temperature?
A. It will decrease. B. It will decrease at first, and then increase. C. It will increase. D. It will remain the same.