In what way can human practices contribute to desertification?
A) overgrazing by livestock
B) growth of too much crop cover
C) growth of trees
D) irrigation with rainwater
A
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The angle at which the Sun's rays strike the Earth has a great effect on
A) Earth's seasons. B) the way climate varies with latitude. C) the intensity of solar energy received at Earth's surface. D) all of the above
As a storm grows from a tropical depression to a Category ? hurricane, how
do the surface pressure and the wind speed change? What will be an ideal response?
Crescent-shaped dunes formed where the amount of sand is outweighed by gravel and bedrock are
A) parabolic dunes. B) barchan dunes. C) transverse dunes. D) star dunes.
Vitamin A deficiencies are associated with
A. Blindness B. Poorly developed neural systems in embryos C. Weak bones D. A lack of energy, or listlessness E. Anemia