Which structures in rocks are planes of weakness that can fail?
A. foliation
B. faults
C. bedding
D. All of the above.
Answer: D
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In the above map, the darker areas most likely represent areas of higher
A) birth rates. B) death rates. C) refugee populations. D) education levels. E) nutritional densities.
What part of the water cycle requires direct input of solar energy?
A) precipitation B) condensation C) evaporation D) infiltration
Evidence from proxies indicate eight major oscillations in global temperatures over the past 800,000 years, most likely the result of
A) rising and falling sea levels that greatly impact photosynthetic activity. B) variations in solar activity that produce different levels of radiation. C) Milankovitch cycles of periodic variations in Earth's orbits around the sun. D) lunar cycles in which the moon orbits at different distances from the Earth.
What percentage of the commercial energy used in the United States is wasted?
A. 5% B. 14% C. 35% D. 50% E. 84%