The sand dunes shown in this photograph





A) are isolated and have well-defined crescent shapes.

B) formed in a wet climate based on their shape.

C) are part of a complex dune field.

D) are loess deposits.

E) are inactive because they have been eroded by running water.


C) are part of a complex dune field.

Environmental & Atmospheric Sciences

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Indicate whether the statement is true or false

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What percentage of oil that enters the oceans worldwide is caused by underwater natural oil seeps?

A) 6% B) 22% C) 47% D) 53% E) 72%

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Which of the following is a TRUE statement?

a. Energy and matter flow in one direction only. b. Energy and matter both cycle repeatedly. c. Energy flows in one direction, while matter recycles. d. Matter flows in one direction, while energy recycles.

Environmental & Atmospheric Sciences