How does convection cause the motion of plates that drives plate tectonics?
A) Convection blows the plates around the earth.
B) Cold, dense lithosphere sinks, while hot, low-density mantle rises to the surface at hot spots
C) Radiation of heat causes the plates to move, which in turn causes convection
D) Refraction of heat from the sun heats the plates, causing convection and the motion of the plates.
Answer: B
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A) system. B) network. C) toponym. D) hearth.
Based on principles discussed earlier in the course, you know that the annual temperature range of places located in the interior of a continent is ____ those places located along the coast at the same altitude.
(a) greater than (b) less than (c) the same as
Which of the following might best explain the reason why electrons are restricted to certain energy levels in an atom?
A. They are travelling at very high speeds. B. They behave like restricted waves and are self-reinforcing. C. They are interacting with the light around the atom. D. They are out of phase and self-destruct when outside of distinct energy regions. E. They behave like chaotic waves of alternating frequency.
The Cartagena Protocol (1992) is an international agreement dealing with
A) global warming from methane produced by cattle. B) the illegal drug trade. C) pollution from fertilizer runoff. D) trade in genetically modified (GM) food products.