In association with other natural factors, the Milankovitch cycles explain the advance and retreat of glaciers according to which of the following time periods?
A. hundreds of millions of years
B. several million years
C. ten thousand years to one hundred thousand years
D. hundreds of thousands of years
Answer: C
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The Cordilleran orogeny took place in the western part of North America. Indicate whether the statement is true or false
Members of the phylum Echinodermata move using a(n) ____________ ____________ system and include the sea
stars, brittle stars, sea urchins, and sea cucumbers. Fill in the blank(s) with the appropriate word(s).
In general, centrally planned economies are run to promote the
A) interests of society, while free-market economies depend on the self-interests of individuals. B) prosperity of all countries, while free-market economies promote the particular interests of a society. C) self-interests of individuals, while free-market economies promote the interests of governments. D) health of the environment, while free-market economies sacrifice sustainability.
Which is an example of an impervious surface?
A) sidewalks B) forests C) farms D) athletic fields E) meadows