Which of the following is true of the Terrestrial planets?
A) The smaller Terrestrial planets have molten cores.
B) The smaller Terrestrial planets tend to be geologically active.
C) The larger Terrestrial planets have solid cores.
D) The larger Terrestrial planets tend to be geologically active.
D
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What is the wave speed of a wave traveling an average distance of 6 meters in one second?
A) less than 0.2 m/s B) 1 m/s C) 3 m/s D) 6 m/s E) more than 6 m/s
What is the K-T boundary?
A) a layer of dark sediment in the geological record formed at the same time humans learned to use fire B) a boundary between rocks containing the oldest life and older rocks that contained no life C) a boundary between the Earth's crust and the molten rock beneath it D) a layer of dark sediment in the geological record separating the Cretaceous and Tertiary periods of Earth's history
Radio waves are reflected by which of the following ion layers?
a. C b. D c. F d. A
For all reversible processes involving a system and its environment:
A. the entropy of the system does not change B. the entropy of the system increases C. the total entropy of the system and its environment does not change D. the total entropy of the system and its environment increases E. none of the above