Recently, the major causes of acid-generating emission has shifted from
A) nitrogen oxides to sulfur oxides.
B) sulfur oxides to nitrogen oxides and ammonia.
C) carbon dioxide to carbon monoxide.
D) ozone and PANs to VOCs.
B
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What type of rock is formed from the weathered and eroded remains of other rocks?
A. igneous B. mineral C. metamorphic D. sedimentary E. organic
Wars in the Middle East region in the past two decades have been associated with increased
A) efforts to stop global terrorism wherever it exists in the world. B) demand for natural gas. C) U.S. interests in Middle East oil. D) interest in resolving the Palestinian Israeli border disputes.
________ occur in which the hanging wall block moves up relative to the footwall block
A) Normal faults B) Reverse faults C) Strike-slip faults D) Grabens
U.S. inner cities face fiscal problems because
A) federal and state funds are available. B) low-income people are concentrated there. C) middle-class families are attracted there. D) redlining is no longer legal. E) blockbusting has strengthened ethnic neighborhoods.