The absorption of an infrared photon that excites an atom to emit a green photon
A) occurs in plants.
B) occurs in the process of phosphorescence.
C) would violate the law of energy conservation.
D) all of the above
E) none of the above
Answer: C
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If Mars had liquid water on its surface in the distant past, then its atmosphere must have been ________ than it is now.
A. denser B. warmer C. wetter D. All of these choices are correct. E. None of these choices is correct.
What does the Moon's low density suggest about its internal structure?
A. The Moon's iron core is smaller relative to Earth's. B. The lunar interior has not differentiated. C. The Moon's crust is very thick and poor in iron. D. The lunar mantle extends to the center of the Moon.
A car uses gasoline to convert
A) potential energy into radiative energy B) kinetic energy into potential energy C) radiative energy into kinetic energy D) potential energy into kinetic energy
On a weather map we see an H for Highs and an L for Lows. In a high pressure region we generally can find
A) stormy weather. B) clear skies. C) very cold temperatures. D) cloud cover.