The envelope of gases that surrounds the Earth or another planet is called atmosphere. On the Earth, it extends to about 1000 km from the surface, but 99% of the total mass of it is found within 32 km because of gravitation pull of the Earth.
Atmospheric Composition Table
|
S. No. |
Gas |
Percentage |
| 1 | Nitrogen | 78% |
| 2 | Oxygen | 21% |
| 3 | Argon | 0.93% |
| 4 | Carbon Dioxide | 0.03% |
| 5 | Neon | 0.0018% |
| 6 | Helium | 0.0005% |
| 7 | Ozone | 0.0006% |
| 8 | Hydrogen | 0.00005% |
| 9 | Etc. |
