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
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
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