What could ultimately be linked to the lack of water on Mars?
A) The large decrease in carbon dioxide.
B) The proximity to the sun.
C) The lack of free oxygen in the atmosphere.
D) The lack of outgassing from the interior of the planet

Question

Quizplus · Accepted Answer

The large decrease in carbon dioxide could explain why there is currently no water found on Mars. Carbon dioxide is a greenhouse gas which can insulate a planet. As the carbon dioxide began to be absorbed by rocks, the atmosphere became thin. This made the surface very cold. The ocean disappeared because the water either bound to rocks or froze beneath the surface. Information can be found in the section Are There Other Ocean Worlds.

What Could Ultimately Be Linked to the Lack of Water