The first atmosphere would have consisted of gases in the solar nebula, primarily hydrogen. In addition there would probably have been simple hydrides such as are now found in gas-giant planets like Jupiter and Saturn, notably water vapor, methane and ammonia.
The next atmosphere, probably consisting largely of nitrogen (partly in the form of ammonia), carbon dioxide,water vapor and other gases, but no free oxygen. This amosphere was produced by outgassing from volcanism, supplemented by gases produced during the late heavy bombardment of Earth by huge asteroids.
Free oxygen did not exist until about 1.7 billion years ago (thank you plants).
Carbon dioxide was the most abundant gas in the early atmosphere but now it is nitrogen which is about 71%. The other gases that are in the air are oxygen which is approximately 20%, carbon dioxide which is 0.04%, argon (noble gas) which is 0.9% and water vapour.
The most abundant gases are nitrogen and oxygen in the Earth atmosphere.
There are smallamount of volcanoes. They emit so2 and co2 gases.
Most abundant - Water Vapor
The most abundant gases in the Earth atmosphere are: nitrogen, oxygen, argon, carbon dioxide, neon, helium.
It is radiated by many of the gases in the lower atmosphere.
on ancient Earth, nitrogen, water vapor, carbon dioxide, and methane were probably the most abundant gases in the atmosphere.
Nitrogen & oxygen.
Nitrogen and oxygen, respectively, are the two most abundant gases in the earth's atmosphere.
Hydrogen, Nitrogen, Oxygen
Nitrogen and Oxygen
Hydrogen and helium
Nitrogen N2 78.08% Oxygen O2 20.95%
The Abundant gases are Nitrogen, Helium, and other gases in the Secondary Atmosphere.
energy from the sun,lightening,earths heat triggered chemical reaction for the early gases of the earth combined
The most abundant gases are nitrogen and oxygen in the Earth atmosphere.
Helium is the most abundant of the Noble gases in the universe.
There are smallamount of volcanoes. They emit so2 and co2 gases.