Economic mineral deposits of ____ are common in Carboniferous and Permian strata in the northeastern part of the
U.S., where they formed as organic sediments (i.e., the remains of plants) deposited in wetland environments west of the
Appalachian Mountains.
a. gold
b. uranium
c. platinum
d. coal
e. archaeocyathid
d
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Absorption:
A) is performed quite well by the atmosphere for visible wavelengths. B) is done to differing degrees by different gases. C) does not prevent most ultraviolet light from reaching Earth's surface. D) is typically greater in desert areas than in humid areas.
If the earth's gravitational force were to increase, atmospheric pressure at the ground would:a
increase. b. decrease. c. remain the same. d. cause the atmosphere to expand vertically.
Proxy data used to estimate global temperatures of the past suggest that:
A) the earth is warming at an unusual rate. B) the earth is warming at a rate consistent with natural causes. C) the earth is cooling at an unusual rate. D) the earth is cooling at a rate consistent with natural causes.
If everyone in the world lived a lifestyle similar to the average U.S. citizen we would need ________ more planets to support everyone.
A. eight B. two C. six D. four