Question

problem set 47 begin date: 10/24/2025 12:01:00 am due date: 10/31/2025 11:59:00 pm end date: 11/2/2025 11:59:00 pm
problem 8
on some parts of mars, it gets cold enough for a gas to freeze out of the atmosphere that does not freeze out by itself at the temperatures and pressures on earth. this gas makes up some of the polar caps on mars and is
methane. oxygen. water
carbon dioxide. argon.
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Explanation:

Mars' polar caps are mainly composed of carbon dioxide (dry - ice) which can freeze out at the extremely low temperatures on Mars. Methane has a very low freezing point and is not a major component of Mars' polar caps. Oxygen and argon have very low freezing points and do not form significant parts of the polar caps. Water ice is present on Mars but the main gas that freezes out to form a large part of the polar caps (especially the seasonal polar caps) is carbon dioxide.

Answer:

carbon dioxide