What caused the many small holes that are seen in this sample of scoria?
A) impacts by volcanic bombs
B) dissolving away of minerals
C) degassing of volatiles
D) raindrops
Answer: C
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Which region of the United States has the greatest potential for the development of large-scale windmill arrays?
A. the Great Plains B. the Gulf Coast C. the Rocky Mountains D. the New England states
A cannonball fired from a cannon begins to fall
A. soon after following a straight-line path. B. as soon as it leaves the barrel. C. after air friction reduces its speed. D. none of the above
________ coal has the highest heat content
Fill in the blank(s) with correct word
One of the following pairs of terms refer to sedimentary characteristics that you would not expect to find together in the same environment of deposition. The pair that does not make sense together is ___
a) high-energy beach, sand b) mountain stream, angular boulders c) quiet lagoon, mud d) deep submarine basin, mud cracks e) lake bottom, mud