Which of the following is not a property of soil clay?
A) It occurs as thin laminar sheets.
B) It is made primarily of silt.
C) It is colloidal in size.
D) Many chemical reactions occur on its surfaces.
E) It is able to hold water to itself.
Answer: B
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Describe why there are such massive petroleum deposits in the Persian Gulf region
Both consumptive use and productive use of natural ecosystems are necessary for high-level human development. To what degree should consumptive use hold priority over productive use? Think about more than one resource (lumber, bush meat, etc.)
What will be an ideal response?
What has been the trend in human evolution since the appearance of the Cro-Magnons?
a. Several small subspecies have appeared, acclimated to mini-environments. b. Evolution has proceeded slower than usual. c. Peripheral speciation has resulted in the emergence of the Neanderthals. d. Evolution has become cultural rather than biological. e. Size of organisms has steadily decreased
Hydroelectric power is the second most popular source of electricity after
A) nuclear power. B) wind turbines. C) biomass. D) solar. E) coal.