Which of the following components of a "typical" soil is most abundant?
a. water
b. gases
c. organic matter
d. mineral matter
e. unweathered rock
D
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In defining heat, which of the following describes the direction of energy transfer?
A. from high pressure areas to low pressure areas B. from cold objects to hot objects C. from low pressure areas to high pressure areas D. from hot objects to cold objects
Which are true of a hypothesis?
A. It is the same thing as a theory. B. It is assumed to be true and requires no further examination. C. None of these choices are correct.
Afghanistan is important to the world drug trade primarily because
A) it produces about 90 percent of the world's opium. B) U.S. troops consume most of the opium grown there. C) of the inability to grow maize. D) of the proximity of the Russian market for illicit drugs. E) of the desire of local farmers to fund terrorist organizations.
Since data collection began in 1978, the overall energy emitted from the sun has:
A) increased dramatically. B) increased slightly. C) decreased dramatically. D) decreased slightly.