Meaning of ATMOSPHERE in English
Gaseous envelope that surrounds the Earth.
Near the surface it has a well-defined chemical composition (see air ). In addition to gases, the atmosphere contains solid and liquid particles in suspension. Scientists divide the atmosphere into five main layers: in ascending order, the troposphere (surface to 68 mi, or 1013 km); the stratosphere (411 mi, or 617 km, to about 30 mi, or 50 km); the mesosphere (3150 mi, or 5080 km); the thermosphere (50300 mi, or 80480 km); and the exosphere (from 300 mi and gradually dissipating). Most of the atmosphere consists of neutral atoms and molecules, but in the ionosphere a significant fraction is electrically charged. The ionosphere begins near the top of the stratosphere but is most distinct in the thermosphere. See also ozone layer .
Britannica Concise Encyclopedia. Краткая энциклопедия Британика. 2012