List the four layers of the atmosphere and give a brief description of the bottom layer. [Answer Limit: 125 words] [UKPSC 2012]
Reena BhattBegginer
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The four layers of the atmosphere are:
Troposphere
Stratosphere
Mesosphere
Thermosphere
The Troposphere is the lowermost layer, extending from the Earth’s surface up to about 8 to 15 kilometers. It is where all weather phenomena occur, including clouds, rain, and storms, making it crucial for life on Earth. The temperature in the troposphere decreases with altitude, and it contains approximately 75% of the atmosphere’s mass and nearly all its water vapor. This layer is characterized by a rich mix of gases and is vital for sustaining life. The boundary between the troposphere and the stratosphere is known as the tropopause, which acts as a barrier to weather systems, influencing climate patterns significantly.