Nitrogen and oxygen.
mesosphere
troposphere
the earth first atmosphere is troposphere
The first atmosphere of the earth was probably mostly hydrogen with some simple hydrides such as water vapor, methane and ammonia. Vulcanism and asteroidal bombardment eventually replaced this with an atmosphere of mostly nitrogen, with carbon dioxide and some of the inert gasses.
It's called lithosphere as I remember in science.
mesosphere
troposphere
the earth first atmosphere is troposphere
The first atmosphere of the earth was probably mostly hydrogen with some simple hydrides such as water vapor, methane and ammonia. Vulcanism and asteroidal bombardment eventually replaced this with an atmosphere of mostly nitrogen, with carbon dioxide and some of the inert gasses.
photosynthesis
the earths atmosphere
troposphere
TyCHO BRACHE
This gas was carbon dioxide.
sputnik
It's called lithosphere as I remember in science.
The earths first atmosphere was created by the methane, carbon dioxide, sulphur oxides and water vapor that volcanoes were pumping out. Oxygen started to come in noticeable quantities once life had formed. Nitrogen is inert, so doesn't do anything.