What are Layers of Atmosphere? - Structure, Importance The
Earth's atmosphere is made up of five main layers, each with its own characteristics and purpose:
Troposphere: The lowest layer, with an average height of 13 km.
Stratosphere: Located above the troposphere, and extends up to about 50 km above the ground. The ozone layer is in the stratosphere.
Mesosphere: One of the five main layers of the atmosphere.
Thermosphere: Also known as the upper atmosphere, this layer is between 53 miles and 375 miles above the Earth.
Exosphere: The outermost layer, extending from about 375 miles to 6,200 miles above the Earth.
Atmosphere: Role, Structure & Composition -
Each layer is separated by "pauses" where there are the greatest changes in density, chemical composition, movement, and thermal characteristics.
The atmosphere is also made up of different gases, including:
Nitrogen: 78% of the atmosphere is made up of nitrogen.
Oxygen: 21% of the atmosphere is made up of oxygen.
Argon: 0.9% of the atmosphere is made up of argon.
Carbon dioxide: 0.03% of the atmosphere is made up of carbon dioxide.
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