The word topsoilis commonly used, but not always correctly. The proper definition is ________.
a. the entire soil down to the base of the C horizon
b. the A, E and B horizons
c. the dark, organic rich layers of O and A
d. only the O horizon
c. the dark, organic rich layers of O and A
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Which of the following does not describe ionic compounds?
A. They have a tendency to melt easily. B. They are usually very ordered. C. They are held together by electrostatic attraction. D. They consist of positive and negative ions. E. none of the above
The column of the geologic time scale that represents the longest/largest time span is called a(n) ________.
A. Epoch B. Period C. Era D. Eon
The type of feature shown in this figure is
A) a braided stream.
B) river terraces.
C) alluvial fans.
D) entrenched meanders.
E) None of these are correct.
What best characterizes downstream flooding?
A. small volume flood that slowly rises and falls B. large volume flood that slowly rises and falls C. floodwaters that rapidly rises and falls D. fast moving floodwaters that follow small tributaries E. slow moving floodwaters that follow small tributaries