The document summarizes the layers of Earth's atmosphere. It begins with the troposphere, the lowest layer where weather occurs and life exists. Above is the stratosphere where temperature increases with altitude due to ozone absorption. Next is the mesosphere where temperatures decrease with altitude to as low as -143°C. The thermosphere follows, with temperatures reaching 2000°C from solar radiation. The outermost layer is the exosphere, where molecules can escape into space. The greenhouse effect is also mentioned, where gases trap heat radiating from the surface.