What was the ancient earth's atmosphere?

Answer 1

the primitive atmosphere is yeah its the blank i don't know can u answer

Answer 2

In ancient Earth, the atmosphere was primarily composed of nitrogen, carbon dioxide, water vapor, and small amounts of methane and ammonia. There was little to no oxygen present until photosynthetic organisms evolved and started producing it as a byproduct. This oxygen eventually accumulated in the atmosphere, leading to the development of aerobic organisms.

Answer 3

It was probably carbon dioxide and sulfur molecules from volcanoes.

Answer 4

in pre-historic times, it was very oxygenated

answ2. In the early days before the algae invented photosynthesis, the O2 content was only about 2%.