The most important natural source for the formation of acid for rock weathering at the Earth's surface is dissolved ________.

A. hydrothermal effluent
B. seawater
C. carbon dioxide
D. mantle plumes
E. comets


Answer: C

Environmental & Atmospheric Sciences

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It is generally believed that vast areas of the continental crust known as shields have not been significantly changed for millions of years

Indicate whether the statement is true or false.

Environmental & Atmospheric Sciences

The number of incoming objects is related to their size; the ________.

A. number is the same for each size range B. larger the meteoroids, the greater their abundance C. smaller the meteoroids, the greater their abundance D. size is inversely proportional to the number

Environmental & Atmospheric Sciences

Fronts represent changing weather conditions

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

How do seasons affect the surface winds?

A) During the northern summer, the surface winds shift to the south. B) During the northern winter, the surface winds shift to the south. C) During the northern winter, the surface winds shift to the north. D) All of these choices

Environmental & Atmospheric Sciences