Air aus Wikipedia.
Zum Beitrag
Atmosphere of Earth - Wikipedia, the free encyclopedia
a.new,#quickbar a.new{color:#ba0000}
/* cache key: enwiki:resourceloader:filter:minify-css:5:f2a9127573a22335c2a9102b208c73e7 */
Atmosphere of Earth
From Wikipedia, the free encyclopedia
(Redirected from
Air)
Jump to: ,
"Air" redirects here. For other uses, see
Air (disambiguation).
"Qualities of air" redirects here. It is not to be confused with
Air quality.
Blue light is scattered more than other wavelengths by the gases in the atmosphere, giving the Earth a blue
halo when seen from space.
Limb view, of the Earth's atmosphere. Colours roughly denote the layers of the atmosphere.
The atmosphere of Earth is a layer of
gases surrounding the planet
Earth that is retained by Earth's
gravity. The
atmosphere protects
life on Earth by absorbing
ultraviolet solar radiation, warming the surface through heat retention (
greenhouse effect), and reducing
temperature extremes between
day and
night (the
diurnal temperature variation).
Atmospheric stratification describes the structure of the atmosphere, dividing it into distinct layers, each with specific characteristics such as temperature or composition. The atmosphere has a mass of about 5×1018 kg, three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface. The atmosphere becomes thinner and thinner with increasing altitude, with no definite boundary between the atmosphere and
outer space. An altitude of 120 km (75 mi) is where atmospheric effects become noticeable during
atmospheric reentry of spacecraft. The
Kármán line, at 100 km (62 mi), also is often regarded as the boundary between atmosphere and outer space.
Air is the name given to atmosphere used in
breathing and
photosynthesis. Dry air contains roughly (by volume) 78.09%
nitrogen, 20.95%
oxygen, 0.93%
argon, 0.039%
carbon dioxide, and small amounts of other gases. Air also contains a variable amount of
water vapor, on average around 1%. While air content and
atmospheric pressure varies at different layers, air suitable for the survival of
terrestrial plants and
terrestrial animals is currently known only to be found in Earth's
troposphere and artificial atmospheres.
Contents
2... mehrAir aus Wikipedia.
Zum Beitrag