When frozen water on the surface of Mars heats up during summertime, the water
A) melts and forms liquid pools on the surface.
B) boils off the surface and escapes into outer space.
C) sublimates and goes directly into the gaseous phase.
D) remains frozen because the temperature remains below the freezing point.
E) melts and creates flowing rivers that erode the landscape.

Question

Quizplus · Accepted Answer

On Mars, the atmospheric pressure is too low for water to exist as a liquid, so when frozen water heats up, it sublimates directly from solid to gas.

When Frozen Water on the Surface of Mars Heats Up