Earth's first atmosphere was composed of
A)oxygen,hydrogen,and helium.
B)hydrogen and helium,with trace amounts of ammonia and methane.
C)gases from volcanic eruptions.
D)oxygen,water vapor,carbon dioxide,and methane.

Question

Quizplus · Accepted Answer

The Earth's first atmosphere was formed by volcanic eruptions that released gases like hydrogen and helium. These gases were too light to remain bound to the Earth's surface and eventually escaped into space. The remaining gases, including small amounts of ammonia and methane, formed the primitive atmosphere.

Earth's First Atmosphere Was Composed of