The Sub Saharan African vegetation zone characterized by a mixture of trees and tall grasses with rainfall occurring primarily during the summer season is
A) Desert.
B) Tropical and Coniferous Forest.
C) Coniferous Forest.
D) Tropical Forest.
E) Savanna.
E) Savanna.
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Characteristic of intensive subsistence agriculture is the great amount of ________ required for attaining high yields
A) labor B) fertilizers C) land D) both labor and land E) both land and fertilizers
Which of the following time periods does the Maunder minimum refer to?
A. when the Earth was closer to the sun than it is now B. when the tilt of the Earth's axis was less than it is now C. when the Earth was in the middle of an ice age D. when there were fewer sunspots on the sun than now
Boreal forest has a top layer, or canopy, and two more layers beneath
Indicate whether the statement is true or false.
Suppose it is snowing outside and the air is saturated. The air temperature and dew point are both 15°F, and the actual vapor pressure is 3 mb. If this air is brought indoors and warmed to 75°F, what would the relative humidity of this air be, assuming that its moisture content does not change? (The saturation vapor pressure at 75°F is 30 mb)
a. 5 percent b. 10 percent c. 30 percent d. 50 percent e. 100 percent