The most important factor which contributed to the thinning of the Martian atmosphere was probably the
A) blasting of gas into space by impacts
B) loss of the planet's protective magnetic field as it rapidly cooled
C) chemical reactions with surface rocks
D) formation of the polar caps

Question

Quizplus · Accepted Answer

The loss of the planet's protective magnetic field as it rapidly cooled is the most important factor in the thinning of the Martian atmosphere. Without a magnetic field, the solar wind can strip away the atmosphere's lighter gases, resulting in the thinning of the atmosphere over time. While the other options might contribute to the thinning, they are not as significant as the loss of the planet's magnetic field.

The Most Important Factor Which Contributed to the Thinning of the Martian