During the Pleistocene, ____ experienced major glacial expansion
a. North America and Eurasia
b. Antarctica and Greenland
c. Antarctica and North America
d. Greenland and South America
a
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The higher the gas pressure builds in a magma,
A) the more explosive the eruption. B) the less explosive the eruption. C) the longer the lava will flow. D) the shorter the lava will flow.
Secondary extraction of petroleum ________
A) uses solvents, water, or steam B) allows the oil to be extracted to the last drop C) occurs immediately after primary extraction D) is less expensive than primary extraction E) causes less environmental damage than tertiary extraction
A ________ is a landform which almost always assumes a circular shape.
A) hook B) tombolo C) spit D) atoll E) none of the above
Map projections are mainly derived ________
A) mathematically B) from interpolation C) from aerial reconnaissance D) by analogy E) by osmosis