I believe the 3 most dominant gases of our atmosphere are nitrogen, carbon dioxide and methane
nitrogen and oxygen
Oxygen and Nitrogen
Most of earth's atmosphere is in the lowest layer, the troposphere. Thus most of the gases are within 15 km of the Earth's surface.
greenhouse affect
Liquid water, a suitable mix of atmospheric gases, proximity to the sun, the magnetosphere, Earth's size; all make life possible on Earth.
The atmospheric gases carbon dioxide, methane and nitrous oxide are all greenhouse gases that help to heat the Earth.
95% carbon dioxide, 3% nitrogen, 1.5% argon
The atmosphere refers to the envelope of gases surrounding the planets like the earth.
The dominant gas on Mercury is oxygen, which makes up 42 percent of the planet's atmosphere, followed by sodium, which makes up 29 percent. Other gases include hydrogen and helium.
nitrogen and oxygen
within 8 to 12 km of earth's surface
Within 8 to 12 KM of Earth's surface
50
Oxygen and Nitrogen
Carbon Dioxide makes up roughly 96.5% of Venus' atmosphere. Nitrogen makes up another 3.5%, leaving trace amounts of other gases.
Most of earth's atmosphere is in the lowest layer, the troposphere. Thus most of the gases are within 15 km of the Earth's surface.
78% nitrogen, 21% oxygen, 0.9% argon, 0.03% carbon dioxide