One drawback of in-situ recovery techniques is ________
A) the potential for soil compaction from the heavy equipment requires
B) that the land is often not reclaimable after mining operations cease
C) the potential for leakage of acids into groundwater
D) that the technique often results in severe erosion, especially in steep areas
E) that although the techniques are scientifically feasible, they are not economically feasible
C
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The scientific method is a method for
A) making hypotheses. B) gaining new knowledge. C) making observations. D) testing theories. E) designing experiments.
Everything else being equal, above which of the following surfaces does the lowest air temperature occur on a winter night?
A. surface covered with water B. surface covered with vegetation C. surface covered with snow D. bare surface
A subsidence inversion develops when:
A) the mixing layer gets deeper. B) the air at the top of the mixing layer gets much colder. C) warming, subsiding air of an anticyclone traps the turbulent zone near the ground. D) air near the ground chills rapidly as radiation is emitted during the night.
How do sand dunes and ventifacts on Mars compare to sand dunes and ventifacts on Earth?
A) They are much larger. B) They are shaped differently due to the composition of the Martian surface. C) They are considerably smaller. D) They are the same.