| The Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly (by molar content/volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, trace amounts of other gases, and a variable amount (average around 1%) of water vapor. |
| •owl:Thing |
| •SuperTerms:Coastal_Change_Topic |
| •SuperTerms:Agents_of_Coastal_Change |
| •SuperTerms:Natural_Process |
| •Atmosphere |
| •Theme |
| •Physical |
| •Atmosphere |