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Oxygen.
oxygen
balls
You must be thinking of water. It varies a lot, but can be up to about 4%.
The Gas Giants have a deep gas atmosphere and earth have a not so deep atmosphere
argon
Oxygen.
oxygen
Oxygen (O2)
Nitrogen, it actually makes up just over 78% of the Earths atmosphere by volume.
Nitrogen - forms about 79-80 percent of Earth's atmosphere.
balls
gas-gas
You must be thinking of water. It varies a lot, but can be up to about 4%.
oxygen . hey people googling there science hw. join the club :)
carbon dioxide
The Gas Giants have a deep gas atmosphere and earth have a not so deep atmosphere