The early Earth's atmosphere included methane, carbon dioxide, sulfur dioxide, and hydrogen sulfide but lacked oxygen. This suggests a primitive environment rich in other gases. Understanding this composition is crucial for studying Earth's formation and evolution.

1. 8) The early Earth atmosphere contained everything except: A.) Methane ( CH 4 ) B.) Carbon
dioxide ( CO 2 ) C.) Oxygen (O2) D.) Sulfur dioxide (SO2) E.) Hydrogen sulfide (H2S)