Liquid water cannot exist for very long on the surface of Mars today because
A) it gets rapidly destroyed by intense solar radiation
B) its surface temperature is too high
C) it rapidly reacts with the Martian surface to form peroxides
D) its atmosphere is too thin

Question

Quizplus · Accepted Answer

Mars' atmosphere is too thin to prevent water from quickly evaporating or freezing on the surface. The low atmospheric pressure also causes any liquid water to boil, making it impossible for it to exist in liquid form.

Liquid Water Cannot Exist for Very Long on the Surface