EVERYDAY SCIENCE

Detailed explanation-1: -Earth’s Early Atmosphere and Oceans. Volcanic eruptions spewed gases from Earth’s interior to the atmosphere, a process called outgassing that continues today. Most of the gas was carbon dioxide and water vapor. The water vapor condensed to form part of Earth’s oceans as the surface cooled.

Detailed explanation-2: -(4.6 billion years ago) As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes. It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today’s atmosphere.

Detailed explanation-3: -Earth’s Second Atmosphere The second atmosphere, which was the first to stay with the planet, formed from volcanic outgassing and comet ices. This atmosphere had lots of water vapor, carbon dioxide, nitrogen, and methane but almost no oxygen.

Detailed explanation-4: -The Early Atmosphere-Outgassing. Earth’s first atmosphere 4.6 billion years ago was most likely comprised of hydrogen and helium (two most abundant gases found in the universe!) Through the process of outgassing, the outpouring of gases from the earth’s interior, many other gases were injected into the atmosphere.

Detailed explanation-5: -They concluded that Earth’s early atmosphere contained CH4, H2, H2O, N2, and NH3, similar to the gas mixtures used in the Miller–Urey synthesis of organic compounds.