The technical name for decayed organic material in soil is:
a. caliche
b. laterite
c. parent material
d. humus
d
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The continental glaciers that existed during the Ice Age accumulated at the North Pole and spread southward in all directions
Indicate whether the statement is true or false.
Population projections are predictions of the future, assuming that current trends remain the same
Indicate whether the statement is true or false.
At temperate latitudes, a stable water column with a pycnocline near the surface will ________ primary production in the spring and ________ primary production in late summer.
A. decrease; decrease B. increase; decrease C. decrease; increase D. increase; increase E. None of these is correct; both will be moderately productive.
What is loess?
A. sediment formed into sand dunes B. wind-deposited, fine-grained silt C. sediment transported in sand dunes D. wind-abraded rock fragments E. sediment eroded through deflation