Nationwide in the United States, particulates come mostly from ________, but in urban areas they are derived from vehicles and industrial sources
A) soil erosion
B) smoke from burning forests
C) coal-fired power plants
D) roads and construction sites
E) non-U.S. sources
Answer: A
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It is predicted by demographers that how many people will live in the North American Region by the year 2050?
A) 423 million B) 270 million C) 323.9 million D) 41 million E) 464 million
Which of the following major ocean currents flow parallel to the coast of North America?
A. California Current, Gulf Stream, and Labrador Current B. Labrador Current, Canary Current, and Gulf Stream C. Labrador Current, Canary Current, and California Current D. Kuroshio Current, California Current, and Labrador Current
In which of the following states has a tornado never occurred?
a. Alaska b. Hawaii c. Maine d. North Dakota e. tornadoes have occurred in every state
A fault
A. is a fracture along which offset has occurred. B. is a seismic gap. C. is a fracture along which offset has not occurred. D. is a special type of fold.