Cultural eutrophication cannot be prevented by ____.
A. banning the use of phosphate detergents
B. preventing runoff of fertilizer from agricultural fields
C. advanced waste treatment
D. harvesting excess weeds
E. soil conservation and land-use controls
Answer: D
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The feature below has angular rocks on the outside and slowly flowing ice on the inside. It is called a(n)
A) ice glacier.
B) nunatak.
C) cirque glacier.
D) rock glacier.
Plant productivity is greatest in natural ecosystems when ________
A) the ecosystems are converted into cropland B) an invasive plant grows unchecked C) endemic species are present D) more species are present
The absorption of longwave radiation by certain gases in the lower atmosphere is responsible for:
A) photon effect. B) atmospheric window effect. C) adiabatic effect. D) greenhouse effect.
The wind around a surface high pressure center in the Northern Hemisphere blows
a. counterclockwise and outward from the center. b. counterclockwise and inward toward the center. c. clockwise and outward from the center. d. clockwise and inward toward the center. e. clockwise and parallel to the center.