Of the following planets, the one with the thinnest atmosphere is
A) Mercury.
B) Venus.
C) Mars.
D) Uranus.

Question

Quizplus · Accepted Answer

Mercury has a very thin atmosphere, with a surface pressure of less than 1% that of Earth's atmosphere. Venus has an extremely thick atmosphere consisting mostly of carbon dioxide, Mars has a thin atmosphere, but still much thicker than Mercury's, and Uranus has a thick atmosphere made mostly of hydrogen and helium.

Of the Following Planets, the One with the Thinnest Atmosphere