Which of the following causes magma to be less viscous?
A. a lower temperature
B. a more felsic composition
C. a higher percentage of crystals
D. fewer silicate chains in the magma
E. None of these choices are correct.
Answer: D
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A) compaction and cementation B) cementation and weathering C) compaction and transportation D) crystallization and cooling
Which of the following describes sun halos?
A. They are most common during clear skies. B. They require a layer of ice crystals. C. They are caused by reflection of light. D. They are usually found near the horizon.
Which of the following gases is a primary component of photochemical smog?
A. chlorofluorocarbons B. ozone C. carbon monoxide D. sulphur dioxide
The best way to decrease the Total Fertility Rate in less developed countries (assuming that it is culturally feasible) may be
A. to send male politicians through gender sensitivity courses. B. to give women more work to do. C. to ensure that females have equal access to education as males. D. to restructure the economy from one based on agriculture to one based on industry.