Argon and trace gases like neon, helium, and methane make up less than 1 percent of Earth's atmosphere.
oxygen . hey people googling there science hw. join the club :)
Oxygen makes up 21% of the Earths atmosphere.
The gas that makes up 93% of Earth's atmosphere is nitrogen. Oxygen is the second most abundant gas, making up around 21%.
The earths atmosphere is made up of 78% nitrogen and 21% oxygen
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argon
Argon makes up about .93 percent of the Earths atmosphere. Hope this helps! (:
Nitrogen makes up about 78 percent of Earth's atmosphere.
Earth's atmosphere is mostly made up of nitrogen, which makes up 79 percent. The atmosphere contains 20 percent oxygen and 1 percent other gases.
Oxygen is the gas that accounts for about 20 percent of Earth's atmosphere.
The approximate percent of oxygen in Earth's lower atmosphere is around 20.95% by volume.
Nitrogen
Approximately 20 percent of the Earth's atmosphere is made up of oxygen.