How might liquid water exist on Mars where the temperature is routinely below the freezing point of water?
A) Martian water may contain salts, which lowers the freezing temperature of the water.
B) Ice is melted by the heat of geological activity.
C) Liquid water emerges from martian volcanoes.
D) Water precipitates from the martian atmosphere.

Question

Quizplus · Accepted Answer

Martian water may contain salts, such as magnesium and calcium perchlorate, which have a lowering effect on the freezing point of water. This allows water to exist in liquid form at temperatures below 0°C on Mars.

How Might Liquid Water Exist on Mars Where the Temperature