What was not one of the gases that made up Earth's original atmosphere? A) nitrogen B) oxygen C) water vapor D) carbon dioxide

Question

Quizplus · Accepted Answer

Oxygen was not one of the gases that made up Earth's original atmosphere. It was only produced by photosynthetic organisms later on in Earth's history. The other three gases (nitrogen, water vapor, and carbon dioxide) were present in the early atmosphere.

What Was not One of the Gases That Made Up