Acidic soils tend to be
A) agriculturally productive because the high concentration of cations in them causes them to attract nutrients with positive ions.
B) agriculturally productive because the low concentration of cations in them causes them to attract nutrients with positive ions.
C) agriculturally unproductive because the high concentration of cations in them causes them to leach away nutrients with positive ions.
D) agriculturally unproductive because the low concentration of cations in them causes them to leach away nutrients with positive ions.
C) agriculturally unproductive because the high concentration of cations in them causes them to leach away nutrients with positive ions.
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The natural service of water purification could not occur without evaporation.
Answer the following statement true (T) or false (F)
Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle.
A) Likely
B) Unlikely
The relationship between air pressure and elevation is nonlinear because:
A) air is compressible. B) air pressure changes with elevation. C) the equation of state is an exponential function. D) There is no clear relationship between temperature and elevation.
What is NOT true about continental ice sheets?
A. Ice accumulates to great depths in the interior. B. They project out over the sea as ice shelves. C. Ice at the margins is thinner than in the interior. D. The process of calving shapes ice shelves. E. Ice does not flow or move like alpine glaciers.