Atmosphere and Climate
1. Atmosphere
- Atmosphere is the blanket of air surrounding the Earth.
- It is held around Earth by gravity.
- It is a mixture of gases, water vapour and tiny dust particles.
- It:
- protects Earth from harmful solar radiation,
- regulates Earth’s temperature,
- influences weather and climate.
2. Composition of Atmosphere
Component | Approx. proportion |
Nitrogen | 78% |
Oxygen | 21% |
Argon | 0.93% |
Carbon dioxide | 0.04% |
Others | 0.03% |