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The troposphere begins at the Earth's surface and extends from 4 to 12 miles (6 to 20 km) high.

The troposphere is between 5 and 9 miles (8 and 14 kilometers) thick.

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Typically, the temperature drops about 6.5° C with each increase in altitude of 1 kilometer (about 3.6° F per 1,000 feet).

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Nitrogen oxygen

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-Life exists-

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The bottom of the stratosphere is around 10 km (6.2 miles or about 33,000 feet) above the ground at middle latitudes.

22 miles (35 kilometers) thick.

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Temperature increases from an average -60°F (-51°C) at tropopause to a maximum of about 5°F (-15°C) at the top of the stratosphere.

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In the stratosphere, air temperature begins to increase. Ozone, a form of oxygen with three atoms per molecule, is concentrated in the stratosphere.

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Suitable for flying aircraft.

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Altitude: about 50 to 85 km
Thickness: 22 miles (35 kilometers) thick

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With an increase in altitude within the mesosphere, the temperature decreases because of a decrease in the absorption of penetrating solar radiation.
-2.5 degrees Celsius to -90 degrees Celsius

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oxygen
nitrogen
carbon dioxide

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The mesosphere burns up most meteors and asteroids before they are able to reach the earth's surface.

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Altitude: 600 kilometers (372 miles) high.
Thickness: 319 miles (513 kilometers) thick.

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Different definitions place the top of the exosphere somewhere between 100,000 km (62,000 miles) and 190,000 km (120,000 miles) above the surface of Earth.

Thickness: about 6,200 miles.

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Temperatures increase again with altitude in the thermosphere, which begins about 80 kilometers (50 miles) above the Earth. They can rise to 2,000°C (about 3600°F).

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The exosphere has gases like hydrogen and helium.

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The exosphere has gases like hydrogen and helium, but they are very spread out. There is a lot of empty space in between. There is no air to breathe, and it's very cold.

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about 200° C (360° F) hotter in the daytime than at night, and roughly 500° C (900° F) hotter when the Sun is very active than at other times. Temperatures in the upper thermosphere can range from about 500° C (932° F) to 2,000° C (3,632° F) or higher.

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atomic oxygen (O)
atomic nitrogen (N)
helium (He)

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High-energy X-rays and UV radiation from the Sun are absorbed in the thermosphere, raising its temperature to hundreds or at times thousands of degrees