What is a Martian dust devil?
A) a line of sand dunes marking the edge of an ancient tectonic plate
B) the name given to one of the humanlike forms imaged on Mars in the 1970s
C) a natural whirlwind on the planet's surface
D) the name given to a possible fossil found in a dust-filled meteorite from Mars
Correct Answer:
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Q199: Which of these statements BEST describes the
Q200: Two observed features on Mars appear to
Q201: Which of these processes did NOT contribute
Q202: The SNC meteorites are
A) granitic rocks from
Q203: Atmospheric pressure at the surface of Mars
Q205: The gas that is the major constituent
Q206: How have planetary scientists obtained samples of
Q207: Which of these properties of Earth and
Q208: A major feature of the atmosphere of
Q209: There are many reasons why a multiday
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