Eluviation occurs due to ____
a. hygroscopic water
b. gravitational water
c. capillary water
d. soil air
e. humus
b
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On land, the carbon dioxide used today in photosynthesis to form carbon-containing organic molecules of plant tissues is mostly returned to the air because of
A) respiration in plants, animals, and organisms in the soil. B) plate tectonics. C) additional photosynthesis in the same plants. D) erosion, decay, and general weathering.
Timor Leste was a ________ colony
A) Dutch B) British C) French D) Portuguese
A true desert is defined by how hot it is
Indicate whether this statement is true or false.
Tantalum, which is highly prized for its use in capacitors for electronic circuits found in most modern electronic devices, comes from the mineral __________.
a. Chromium b. Calcite c. Copper d. Coltan e. Cobalt