Bauxite, which is formed during chemical weathering, is known as a residual concentration
Indicate whether the statement is true or false
True
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Unconventional (noncriteria) pollutants are characterized by all of the following except
A. they are not yet regulated by the EPA. B. they are considered particularly toxic or dangerous. C. they include mercury and organic compounds. D. they have anthropogenic sources.
Major Atlantic hurricanes typically
A) are unaffected by midlatitude westerly winds. B) are affected by midlatitude westerly winds early in their lifetime. C) are affected by midlatitude westerly winds late in their lifetime. D) are affected by midlatitude westerly winds both early and late in their lifetime.
What is the least important energy resource used in the United States today?
A) coal B) natural gas C) nuclear power D) petroleum (oil) E) wood
What is a tarn?
A. irregular depressions shaped by blocks of ice B. water left in a depression made by a cirque C. ridge created when several cirques combine D. steep-sided, pyramid-shaped alpine summit E. ice-eroded “U” shaped valley with steep sides