Mollisols are:
a. strongly acidic and highly leached.
b. rich in plant humus and bases.
c. moderately leached.
d. rich in iron and aluminum oxides.
B
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Most sand on beaches, in desert dunes, and in stream and river channels is made up of ____
A)CaCO3 B)NaCl C)SiO2 D)CaSO4 E)2H2O
The term "natural capital" expresses the idea that the earth, air, water, and life on this planet can be thought of as a kind of "wealth" that we have inherited and that we can choose to well or poorly manage.
a. true b. false
The central American country that was carved out of Colombia in order to build a canal is
A. Nicaragua B. Costa Rica C. Panama D. Honduras
What are lines of equal elevation called on topographic maps?
a. isotherms b. contours c. geological contacts d. lineations e. grid lines