If Mars had liquid water on its surface in the distant past, then its atmosphere must have been ____ than it is now.
A) warmer
B) wetter
C) denser
D) All of these choices are correct.
E) None of these choices is correct.
Correct Answer:
Verified
Q58: Of these, which is evidence that Mars
Q59: Some recent evidence points to the possibility
Q60: A cupful of liquid water placed on
Q61: Why did the discovery of Martian "blueberries"
Q62: Other than in the polar caps, any
Q64: Mars's atmosphere is most similar in composition
Q65: Why is the greenhouse effect weaker on
Q66: Mars spins on its axis at approximately
Q67: The moons of Mars are
A) Phobos and
Q68: What features are unique to Earth?
A) canyons
B)
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