Mars has a sufficient mass and a low enough temperature that water vapor molecules could exist in its atmosphere.Why doesn't Mars' atmosphere contain a significant amount of water vapor?
A) Mars formed in a part of the solar nebula that lacked oxygen.
B) Mars formed in a part of the solar nebula that lacked hydrogen.
C) Water only exists on Earth
D) Much water is frozen in the ice caps or below ground
E) Water is not found in our Solar System

Question

Quizplus · Accepted Answer

Mars' atmosphere doesn't contain a significant amount of water vapor because much of the water is frozen in the polar ice caps or exists as subsurface ice.

Mars Has a Sufficient Mass and a Low Enough Temperature