Nitrogen.
oxygen
The gas that makes up 21% of Earth's atmosphere is oxygen.
Oxygen is the gas that makes up the second most volume in the atmosphere, after nitrogen.
Nitrogen is the gas that makes up the majority of Earth's atmosphere, comprising about 78% of the air we breathe.
Nitrogen makes up about 79% of the atmosphere.
oxygen
Nitrogen
Nitrogen
Nitrogen makes up 78% of the Earth's atmosphere. Oxygen makes up about 21%.
Oxygen is the gas that makes up about 21 percent of the Earth's atmosphere.
What gas makes up the majority of the Earth's atmosphere
The gas that makes up about 78% of Earth's atmosphere is nitrogen. Oxygen is the next most abundant gas, making up about 21% of the atmosphere.