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
Answer: E
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Which of the following conditions defines upwelling?
A. the rising air motion in a low-pressure centre B. the increasing height in an upper-level ridge C. the rising of cold water from below D. the lifting of air along the polar front
Dense fog is hazardous because it: a. reduces the visibility
b. increases the wind chill index. c. increases the dew point temperature. d. None of these choices.
This toxic chemical binds very easily to red blood cells
A) sulfur dioxide. B) sulfur trioxide. C) lead. D) ozone. E) carbon monoxide.
What are fault-block mountains?
A) Mountains formed through folding and thrusting of the crust B) Mountains consisting of exposed batholiths C) Mountains that form by erosion of streams D) Mountains formed through crustal extension and normal faulting