National Geographic - Earth's Atmosphere
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Uploaded by EvolutionaryBiology on Sep 1, 2008
An atmosphere, "vapor" is a layer of gases that may surround a material body of sufficient massm by the gravity of the body, and are retained for a longer duration if gravity is high and the atmosphere's temperature is low. Some planets consist mainly of various gases, and therefore have very deep atmospheres (see gas giants).
The term stellar atmosphere is used for the outer region of a star, and typically includes the portion starting from the opaque photosphere outwards. Relatively low-temperature stars may form compound molecules in their outer atmosphere. Earth's atmosphere, which contains oxygen used by most organisms for respiration and carbon dioxide used by plants, algae and cyanobacteria for photosynthesis, also protects living organisms from genetic damage by solar ultraviolet radiation. Its current composition is the product of billions of years of biochemical modification of the paleoatmosphere by living organisms.
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go science class!
campred51 11 months ago
lol im stupid i thought this was ant and slug
MrOrdile 1 year ago
Very poor Quliti
serialkiller2476 1 year ago
awesome!!!!
KThsir 1 year ago
thats incredible no doubt about it 5*+
PSNIINFIINIITY2009 2 years ago
awesome video
xcenotaph 2 years ago
WOOOOOOOOOOOOOOW!
KathlenaStride09 2 years ago
this is my way of studying thats dude has a silly accent :P
xxSteviexxx 3 years ago
wow
therere 3 years ago
This is incredible. 5+
xpcagrixp 3 years ago