The atmosphere breathed now is the _____ atmosphere Earth has had.

Question

Quizplus · Accepted Answer

The atmosphere we breathe today is considered the third atmosphere of Earth. The first atmosphere was primarily helium and hydrogen, which was replaced by a second atmosphere composed of volcanic gases, including water vapor, carbon dioxide, and ammonia. Over time, photosynthetic organisms contributed to the transformation of this second atmosphere, leading to the oxygen-rich third atmosphere we have today.

The Atmosphere Breathed Now Is the _____ Atmosphere Earth Has