What soil-forming factor includes the contribution of earthworms to soil?

A. geologic
B. climate
C. topographic
D. biological
E. time


D

Environmental & Atmospheric Sciences

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Part of the upper mantle that behaves as a plastic and flows:a

lithosphere d. atmosphere b. asthenosphere e. core c. crust

Environmental & Atmospheric Sciences

Star twinkle is most pronounced when a star is

A) near the horizon. B) 30 degrees above the horizon. C) 60 degrees above the horizon. D) 90 degrees above the horizon. E) 30 degrees below the horizon.

Environmental & Atmospheric Sciences

In the Northern Hemisphere, tornadoes are most frequent during the ________

A) October-December period B) month of September C) January-March period D) April-June period

Environmental & Atmospheric Sciences

Of the great current circuits in the world ocean, there are ________ in the Northern Hemisphere and ________ in the Southern

a. 4; 2 b. 2; 4 c. 3; 3 d. 6; 6

Environmental & Atmospheric Sciences