Which of the following components was NOT a significant part of the earth's early atmosphere?
A) carbon dioxide
B) water vapor
C) nitrogen gas
D) oxygen gas
E) hydrogen gas

Question

Quizplus · Accepted Answer

Oxygen gas was not a significant part of the earth's early atmosphere. It began to accumulate around 2.5 billion years ago, as a result of photosynthetic organisms producing oxygen through their metabolic processes. The early atmosphere was primarily composed of nitrogen gas, carbon dioxide, water vapor, and smaller amounts of other gases such as hydrogen gas.

Which of the Following Components Was NOT a Significant Part