Which of the following is CORRECT regarding soil color?
A) Soil color is a relatively unimportant physical property of soil.
B) Dark soils always indicate high organic content.
C) Color reflects composition and chemical makeup of a soil.
D) Soil color is used solely to determine the moisture content of soil—darker soils have a higher moisture content, whereas lighter soils have less water content.
C
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Sweating cools people because:
A) it releases latent heat. B) it changes the heat capacity of the body. C) colder molecules in a passing wind adhere to the wet skin. D) it involves a transfer of sensible heat.
Multiply by ?,???,??? to convert from millions of gallons per day to
gallons per day. (Hint: Just add six zeroes.) What will be an ideal response?
The chemical binder for many sedimentary rocks, such as limestone, is ________
A) calcium carbonate B) boron C) nitrogen D) basalt E) phosphorous
What are the organisms typically at the bottom of the food chain or at trophic level 1?
A. humans B. fauna C. flora D. microbes and plankton E. grasses