The first function of water vapor in the earth's original atmosphere was to:
A)fall as rain and thus cool the earth's surface.
B)create oxygen.
C)increase the amount of carbon dioxide in the atmosphere.
D)provide needed nourishment for primitive plants.
E)block the solar wind.

Question

Quizplus · Accepted Answer

Water vapor in the earth's original atmosphere fell as rain and thus helped to cool the earth's surface. This also helped to create the first bodies of water on the surface of the earth.

The First Function of Water Vapor in the Earth's Original