Which of the following would probably result in polluted conditions over a fairly long duration?
a. ?a radiation inversion
b. ?a subsidence inversion
c. ?a surface inversion
d. ?overcast skies
e. ?persistent winds
ANSWER: b
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Most basement rock formed during the Archean and Proterozoic eons
a. True b. False
Why are boulders not a mineral?
A. They are not naturally occurring. B. They are not solid. C. They are organic. D. They do not have a well-defined chemical composition. E. They do not have an orderly crystalline structure.
A dark band of rock debris down the middle of a glacier from the union of two adjacent glaciers is a(n) ________
A) kame B) medial moraine C) lateral moraine D) terminal moraine E) arête
A region has just had a 100-year flood. That means that
A. another equally large flood will occur in one hundred years. B. another flood of that size cannot happen in the same year. C. a flood event of that size has a 1 percent probability of occurrence in the next year. D. All of the choices are correct.