Stability of earth materials on slopes depends on the balance of gravitational and frictional forces. Which of the following does NOT have a measurable effect on the balance between gravity and friction?
A. presence of water
B. steepness of a slope
C. atmospheric air pressure
D. types of vegetation on the slope
E. type of rock or sediment that is making up the slope
Answer: C
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Enforcement of Superfund and cleanup of polluted sites has slowed because
A. responsible parties have been quick in cleaning up pollution. B. pollution is no longer a major concern for waste producing industries. C. local governments and small businesses willingly take on the responsibility for cleanup. D. the U.S. Congress refused to renew the tax on oil and chemical companies that funded the program. E. most of the waste sites in the U.S. have already been cleaned up.
If water had a lower specific heat capacity, would ponds and lakes be more likely or less likely to freeze in winter?
What will be an ideal response?
Silica is a term for oxygen combined with silicon.
Answer the following statement true (T) or false (F)
Nearly all the energy that drives the Earth's climate comes from the Sun
Indicate whether this statement is true or false.