Question

Okay, so I've been stuck on this for a couple days. I've looked online and whatnot for answers or some help and nothing. So I came here for some help or even just to direct me somewhere where I could hopefully get some answers.
Briefly summarize the evolution of the atmosphere, starting with the formation of Earth and ending with the evolution of eukaryotic organisms

Answer 1

Here are the Brief summary of the evolution  :

- After earth formed, Volcanoes emtted gas and meteroite brought ice
- Earth cooled and the atmosphere thicken, meanwhile the ocean is also formed
- Cyanobacteria increased the amount of O2
- O2 released into atmosphere and Eukaryotes evolved

hope this helps