This answer explains the four layers of Earth's atmosphere - thermosphere, mesosphere, stratosphere, and troposphere - including their characteristics and features.
The thermosphere is the outermost layer starting at 80 km above the Earth's surface. It has extremely low air density. As you move away from Earth, the air's molecule concentration decreases until it blends into space. The mesosphere is above the stratosphere, known for meteors burning up due to friction. The stratosphere contains the ozone layer, where temperature increases with altitude, providing protection from UV rays. Finally, the troposphere is where all weather phenomena occur, with temperature decreasing as altitude increases.
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