Loess is deposited by
A) glacial outwash
B) dust storms
C) sand dunes
D) wind erosion
B
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Acidic rain, snow, fog, and cloud vapor typically have a pH of ____.
A. about 7.0 B. 5.7 to 6.2 C. less than 5.6 D. about 6.6 E. more than 7.6
Schedules of taxes or duties levied on products as they cross national borders are called ________
Fill in the blank(s) with correct word
The inferential knowledge concerning the nature of the interior of the Earth has been accumulated by ________
A) mining B) seismic wave analysis C) gravity studies D) lunar cycles E) astronomy
What is not considered to be a hidden cost of a gallon of gasoline?
A. government subsidies for oil companies B. tax breaks for car manufacturers and road builders C. research and development for hybrid cars D. cost of pollution control and cleanup E. costs of military protection of oil supplies in the Middle East