Which of the following worlds have the thinnest lithospheres? (Hint: The answer is the same no matter whether you think of "thinnest" in actual depth in kilometers or as a proportion of the planet's radius.)
A) Earth and the Moon
B) Venus and the Moon
C) Mercury and Venus
D) Earth and Mars
E) Earth and Venus
E) Earth and Venus
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An epicycle was used in geocentric models to explain ________.
A. Earth's circular shadow B. parallax C. retrograde motion D. eclipses E. aurora
The hollows on Mercury are:
A) isolated depressions found in all parts of impact craters. B) clusters of depressions found near the center of impact craters. C) large depressions found in the Caloris Basin. D) large depressions found in the smooth plains. E) clusters of depressions that are not associated with impact craters in the smooth plains.
Which of the following is not a piece of evidence supporting the idea that Europa may have a subsurface ocean?
A) Astronomers have detected small lakes of liquid water on Europa's surface. B) Europa has a magnetic field that appears to be induced by Jupiter's magnetic field. C) Photos of Europa's surface show regions that appear to consist of jumbled icebergs frozen in place. D) Europa's surface shows few impact craters.
If you exert a force F on an object, the force which the object exerts on you will
A) depend on whether or not the object is moving. B) depend on whether or not you are moving. C) depend on your mass. D) depend on the object's mass. E) always be -F.