The earth's earliest atmosphere was probably composed mainly of __________, which has/have since largely dissipated into space.

Question

Quizplus · Accepted Answer

The earth's earliest atmosphere was likely composed mainly of hydrogen and helium, the most abundant elements in the universe. These lighter gases have since largely dissipated into space due to their low molecular weight and the earth's relatively weak gravitational field at the time.

The Earth's Earliest Atmosphere Was Probably Composed Mainly of __________