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What is the percentage of oxygen in earths air?
The Earth's atmosphere is composed of about 21% oxygen. This level is important for supporting life on our planet.
20of earths atmosphere is composed of?
nitrogen,oxygen,carbon dioxide,argon, and other gases in small amounts
What percentage of the Earth's atmosphere is composed of oxygen?
About 21% of the Earth's atmosphere is composed of oxygen.
Is earths atmosphere mostly oxygen and hydrogen?
No, Earth's atmosphere is mostly composed of nitrogen (about 78%) and oxygen (about 21%). Hydrogen makes up a very small fraction of Earth's atmosphere, less than 0.1%.
What is 78 of the earths atmosphere composed of?
78% of Earth's atmosphere is composed of nitrogen. Oxygen makes up about 21% of the atmosphere, while the remaining 1% consists of various other gases such as argon, carbon dioxide, and water vapor.
What is earths atmosphere is primarily composed of?
the earth first atmosphere is troposphere
How much of the earths atmosphere is made up of nitrogen and oxygen?
The earths atmosphere is made up of 78% nitrogen and 21% oxygen
Earths atmosphere is dominated by which two gases?
Nitrogen and Oxygen are the two main constituents of air.
What percent of earths atmosphere is oxygen?
97%
Is most of the earths atmosphere covered with oxygen?
no
How did bacteria change early earths atmosphere?
Earth's early atmosphere was primarily composed of carbon dioxide. Early bacteria used carbon dioxide as a source of fuel and as a result produced oxygen.
Approximately 20 percent of the earths atmosphere is composed of?
Oxygen (O2) 21%, Nitrogen (N2) 78%, and traces of other gases like argon, carbon dioxide, and neon.
