Argon makes up about 0.93 percent of the Earth's atmosphere, which is often rounded to 1 percent for simplicity. It is a noble gas and is chemically inert, meaning it does not readily react with other elements. Argon is the third most abundant gas in the atmosphere after nitrogen and oxygen.
Nitrogen makes up 78% of the Earth's atmosphere. Oxygen makes up about 21%.
Nitrogen
The gas that makes up 93% of Earth's atmosphere is nitrogen. Oxygen is the second most abundant gas, making up around 21%.
The atmosphere of Earth is roughly 78% made of nitrogen.
Carbon dioxide makes up the majority of the Martian atmosphere, accounting for about 95% of the gases present.
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 makes up about 79% of the atmosphere.
Nitrogen makes up 78% of the Earth's atmosphere. Oxygen makes up about 21%.
Nitrogen is the gas that makes up the majority of Earth's atmosphere, comprising about 78% of the air we breathe.
What gas makes up the majority of the Earth's atmosphere
Nitrogen
Nitrogen
oxygen
The gas that makes up 93% of Earth's atmosphere is nitrogen. Oxygen is the second most abundant gas, making up around 21%.
Oxygen makes up approximately one-fifth of 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.