A glacier forms when ____
A)snow accumulates to form ice, and the ice mass begins to flow under its own weight
B)temperatures do not rise above freezing
C)snow moves downslope under the influence of gravity
D)meltwater at the base of a snow mass contributes to downslope flow
E)a thick layer of ice is present
A
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In a battery, the following oxidation-reduction reaction is taking place: Mn2O3 + ZnO ? 2 MnO2 + Zn What is undergoing reduction as written?
A. ZnO B. Zn C. MnO2 D. Mn2O3 E. none of the above
Groundwater is defined as
A. water that resides in an aquifer. B. liquid water and ice that resides underground. C. water that resides underground. D. water that resides in the saturation zone.
Plant roots extract water from
A) streams. B) below the water table. C) the saturated zone. D) the unsaturated zone.
Which one of these is a low silica rock that cooled slowly?
A. Rhyolite B. Basalt C. Granite D. Gabbro