layer of Earth's amosphere closest to Earth's surface (where weather takes place and where most pollution occurs)
above troposphere, contains ozone layer, the layer of the atmosphere that lies between the troposphere and the mesosphere and in which temperature increases as altitude increases; contains the ozone layer
The middle layer of Earth's atmosphere; the layer in which most meteoroids burn up.
The outermost layer of Earth's atmosphere, the outermost shell of the atmosphere, between the mesosphere and outer space, where temperatures increase steadily with altitude.
lower region of the thermosphere, at an altitude of 80 to 550 km
The outer layer of the thermosphere, extending outward into space.