Earth's atmosphere
Earth's atmosphere is the layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly 78% nitrogen and 21% oxygen, with trace amounts of other gases. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature extremes between day and night.
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~ Table of Content ~
| ► | Introduction |
| ► | Temperature and the atmospheric layers |
| ► | Pressure |
| ► | Composition |
| ► | Density and mass |
| ► | The evolution of the Earth's atmosphere |
| ► | References |
| ► | See also |
| ► | External links |
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