What is the earths atmosphere composed of?

Answer 1

~75% nitrogen. ~25% oxygen. + tiny fraction of other stuff

======================================

• Nitrogen . . . 78.1%
• Oxygen . . . 20.9%
• Argon . . . 0.93%
• Carbon dioxide . . . 0.04%
• Neon . . . 0.002%
• Helium . . . 0.001%

Less than 0.001% :

• Methane
• Krypton
• Hydrogen

Less than 0.0001%

• Nitrous oxide
• Carbon monoxide

Less than 0.00001%

• Xenon
• Ozone
• Nitrogen dioxide
• Iodine
• Ammonia

Water vapor . . .

• about 0.4% in the whole atmosphere
• typically 1% to 4% at the surface

Answer 2

The Earth's atmosphere is composed mainly of nitrogen (about 78%) and oxygen (about 21%), with trace amounts of other gases like argon, carbon dioxide, and water vapor. This combination of gases creates the air we breathe and helps regulate the Earth's temperature through the greenhouse effect.

Answer 3

78% Nitrogen, 21 Oxygen, and 1% other gases.

Answer 4

nitrogen, oxygen, and trace amounts of other gases

Study Island (Q)

Answer 5

Mostly nitrogen (~78-79%), oxygen (~20%), and a little carbon dioxide, argon, other gasses.

Answer 6

The atmosphere of Earth is made up of mostly nitrogen. Other gases present in the atmosphere are oxygen, carbon dioxide, and argon.

Answer 7

78% nitrogen 21% oxygen, 0.9% argon 0.003% carbon dioxide and other small elements

Answer 8

carbon dioxide, argon, nitrogen