What is necessary for a mass of ice to be considered a glacier?
A. located in a polar region
B. ice that moves or flows
C. located in a sloping area
D. ice that is hard compacted
E. located only in inland areas
B
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Which of the following would be least readily recycled?
A. copper pipes B. lead from car batteries C. aluminum beverage cans D. chromium from stainless steel fixtures
Briefly, outline the mechanism of natural selection. Fill in the blank(s) with the appropriate word(s)
Based on function, the atmosphere has
A) the troposphere and the stratosphere. B) a habitable and nonhabitable zone. C) one continuous region. D) five regions beginning with the outermost thermosphere. E) two functional areas that absorb radiation from the Sun.
The polarity of Earth's magnetic poles has reversed in the past.
Answer the following statement true (T) or false (F)