In the United States, large areas of ________ are blanketed with a cover of loess.

A. the Rocky Mountains
B. the Midwest
C. Arizona and New Mexico
D. Canada
E. California


Answer: B

Environmental & Atmospheric Sciences

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How does carbon enter the atmosphere? What effect does it have on Earth? How does it cycle back for use in biological components?

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Which of the following is the largest carbon sink?

A) Fossil fuels and oil shales B) The atmosphere C) Dead organic matter D) The oceans

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The most dense objects known are black holes

Indicate whether the statement is true or false

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