Oxygen.
Oxygen (O2) 21%, Nitrogen (N2) 78%, and traces of other gases like argon, carbon dioxide, and neon.
Approximately 21% of Earth's atmosphere is composed of oxygen.
The Earth's atmosphere is composed of about 21% oxygen. This level is important for supporting life on our planet.
Oxygen makes up about 21% of Earth's lower atmosphere by volume.
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.
Oxygen (O2) 21%, Nitrogen (N2) 78%, and traces of other gases like argon, carbon dioxide, and neon.
Approximately 21% of Earth's atmosphere is composed of oxygen.
The Earth's atmosphere is composed of about 21% oxygen. This level is important for supporting life on our planet.
Oxygen makes up about 21% of Earth's lower atmosphere by volume.
The most prominent gases are nitrogen (78 percent), oxygen (21 percent) and argon (nine-tenths of a percent).
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.
Hydrogen constitutes about 0.00005% of Earth's atmosphere by volume. While hydrogen is the most abundant element in the universe, it is found in very small quantities in the atmosphere, primarily because it is light and tends to escape into space. Most of the atmosphere is composed of nitrogen (approximately 78%) and oxygen (about 21%).
The approximate percentage of oxygen in Earth's lower atmosphere is around 21% by volume.
the earth first atmosphere is troposphere
Oxygen makes up 21% of the Earths atmosphere.
oxygen . hey people googling there science hw. join the club :)
The earths atmosphere is made up of 78% nitrogen and 21% oxygen