The terrestrial planets in our solar system are
A) Mercury, Venus, Earth, and Mars.
B) Jupiter, Saturn, Uranus, and Neptune.
C) Pluto and Eris.
D) Mars, Jupiter, Saturn, Uranus, and Neptune.
A) Mercury, Venus, Earth, and Mars.
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The period of the Moon's rotation on its axis is
A. much shorter than its revolution around the Earth. B. much longer than its revolution around the Earth. C. the same as its revolution around the Earth. D. longer or shorter depending on what part of the year we are in.
Shepherd moons were discovered because scientists hypothesized their existence after observing:
A) the Cassini Gap. B) the spiral density waves in the ring system. C) that the gaps are not empty space, but low density regions of material. D) the narrow F Ring. E) the backlit E Ring.
Why do we call dark matter "dark"?
A) It blocks out the light of stars in a galaxy. B) It emits no radiation that we have been able to detect. C) It contains large amounts of dark-colored dust. D) It is dark brown or dark red in color.
Is it possible, according to Einstein's relativity, for a child to be biologically older than his or her parents?
A) Yes, if the parents go on a long and fast trip and return to Earth. B) Yes, if the child goes on a long and fast trip and returns to Earth. C) No, because it is not possible to actually move backward through time. D) No, because the principles of relativity don't have anything to do with actual biological aging. E) No, because the "relativity of time" does not allow the actual order of events in time to be switched around.