The Ogallala Aquifer is a source of
A) salt water.
B) minerals.
C) freshwater.
D) magma.
C
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Some ________ rock is formed from minerals that were once dissolved in water.
A. igneous and metamorphic B. metamorphic C. igneous D. sedimentary
Why does water released from a dam erode the streambed so much more than it would have before the dam existed?
A) It has a greatly increased velocity. B) It has more stream power than it would have had before the dam. C) The dry stream bed below the dam weakens while it is left dry. D) The stream power now exceeds the sediment load by a great amount.
Particulate pollution can affect the intensity of the urban heat island via
A) their release of latent heat. B) their effect on the radiation balance. C) their transparency to both shortwave and longwave radiation. D) their ability to store heat.
Some people will remark that the “Sun appears to be drawing up water” when they are actually observing ____
a. brocken bow b. anticrepuscular rays c. crepuscular rays d. glories e. halos