What is the dominant reason why Mars has a much thinner atmosphere than Earth?
A) Mars has a smaller escape velocity.
B) The early oceans of Mars removed more carbon dioxide.
C) Mars outgassed much less carbon dioxide due to its small size.
D) Mars stores much more carbon dioxide in its polar ice caps.

Question

Quizplus · Accepted Answer

Mars has a smaller escape velocity due to its lower mass compared to Earth, making it easier for atmospheric gases to escape into space. This is a key factor in why Mars has a much thinner atmosphere.

What Is the Dominant Reason Why Mars Has a Much