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exosphere

exosphere The outer region of the upper atmosphere extending from a base of 500–750 km altitude. The zone has a very low concentration of gases (mostly molecules of oxygen, hydrogen, and helium, although some are ionized). Gases can escape from it into space, as molecular collisions are much reduced because of the low gas density. The exosphere and much of the underlying ionosphere form part of the magnetosphere.

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"exosphere." A Dictionary of Ecology. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"exosphere." A Dictionary of Ecology. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/exosphere-0

"exosphere." A Dictionary of Ecology. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/exosphere-0

exosphere

exosphere Outer region of the upper atmosphere extending from a base of 500–750 km altitude. The zone has a very low concentration of gases (mostly molecules of oxygen, hydrogen, and helium, although some are ionized). Gases can escape from it into space, as molecular collisions are much reduced because of the low gas density. The exosphere and much of the underlying ionosphere form part of the magnetosphere.

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"exosphere." A Dictionary of Earth Sciences. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"exosphere." A Dictionary of Earth Sciences. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/exosphere

"exosphere." A Dictionary of Earth Sciences. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/exosphere

exosphere

exosphere: see atmosphere.

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"exosphere." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"exosphere." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/exosphere

"exosphere." The Columbia Encyclopedia, 6th ed.. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/exosphere