The currently thin atmosphere of Mars is likely due to its:
A) lack of volcanic activity.
B) weak gravitational field.
C) extreme temperature variations.
D) all of the above

Question

Quizplus · Accepted Answer

Mars' thin atmosphere can be attributed to several factors: its lack of significant volcanic activity, which in Earth's case contributes to the replenishment of atmospheric gases; its weak gravitational field, which is less capable of holding onto atmospheric particles, especially the lighter ones, leading to atmospheric escape; and its extreme temperature variations, which can also influence the rate at which atmospheric gases are lost to space.

The Currently Thin Atmosphere of Mars Is Likely Due to Its