Assume that man's recorded history can be stretched back to 4600 years before the present. This is approximately what fraction of geologic time?

A) one hundred-thousandth B) one millionth
C) one billionth D) one ten-thousandth


B

Environmental & Atmospheric Sciences

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What is the difference between a community and an ecosystem?

What will be an ideal response?

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What do these teardrop-shaped hills (drumlins) record?



A) Ancient lake levels
B) Piles of sediment recording past positions of the end of the glacier
C) Erosion and sculpting of soft materials by a moving glacier
D) Melting of large blocks of rock in the ice

Environmental & Atmospheric Sciences

Heavy seasonal rains are called ___________.

Fill in the blank(s) with the appropriate word(s).

Environmental & Atmospheric Sciences

What country is NOT one of the United States' five largest trading partners?

A) Japan B) Great Britain C) Germany D) Mexico E) Canada

Environmental & Atmospheric Sciences