Which is the lowest layer of the Atmosphere ?

The correct answer is Troposphere.

Key Points

• Troposphere
  • The troposphere is the lowest layer of the Earth's atmosphere.
  • The air is very well mixed and the temperature decreases with altitude.
  • The air in the troposphere is heated from the ground up.
  • The surface of the Earth absorbs energy and heats up faster than the air does.

Additional Information

• The different layers of the atmosphere are listed below:
  • Exosphere
    • This is the upper limit of our atmosphere.
    • It extends from the top of the thermosphere up to 10,000 km (6,200 mi).
  • Thermosphere
    • The layer present right above the mesosphere extending to a height of 450 km is the thermosphere.
    • Aurora and satellites occur in this layer.
    • This layer is composed of electrically charged ions that are responsible for reflecting the radio waves back to the Earth's surface.
      • Due to the presence of these ions, the thermosphere is also known as the ionosphere.
  • Mesosphere
    • The mesosphere starts just above the stratosphere and extends to 85 km (53 miles) high.
    • Meteors burn up in this layer.
  • Stratosphere
    • The stratosphere starts just above the troposphere and extends to 50 km (31 miles) high.
    • The ozone layer, which absorbs and scatters the solar ultraviolet radiation, is in this layer.