Friction makes meteors burn up
Most meteors are converted into dust on their way down Earth’s atmosphere, but it is not the air particles’ friction against the meteors that heat the rocks and make them fall apart.
The heat is generated in the air in front of the meteor, where the air molecules are extremely compressed, and the high pressure makes the temperature rise, so the air catches fire. The heat affects the meteor’s surface and starts to consume the rock, until it is finally gone.