A primary atmosphere is an
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atmosphere — atmosphereless, adj. /at meuhs fear /, n., v., atmosphered, atmosphering. n. 1. the gaseous envelope surrounding the earth; the air. 2. this medium at a given place. 3. Astron. the gaseous envelope surrounding a heavenly body. 4. Chem. any… … Universalium
atmosphere, evolution of — Introduction the development of Earth s (Earth) atmosphere across geologic time. The process by which the current atmosphere arose from earlier conditions is complex; however, evidence related to the evolution of Earth s atmosphere, though… … Universalium
Primary production — For other uses, see Primary production (economics). Global oceanic and terrestrial photoautotroph abundance, from September 1997 to August 2000. As an estimate of autotroph biomass, it is only a rough indicator of primary production potential,… … Wikipedia
Atmosphere — An atmosphere (from Greek ατμός atmos , vapor + σφαίρα sphaira , sphere ) is a layer of gases that may surround a material body of sufficient mass, [ [http://www.ontariosciencecentre.ca/school/clc/visits/glossary.asp Ontario Science Centre… … Wikipedia
Atmosphere of the Moon — The atmosphere of the Moon is very tenuous and insignificant in comparison with that of the Earth. One source of the lunar atmosphere is outgassing: the release of gases such as radon that originate from radioactive decay within the crust and… … Wikipedia
Primary School Leaving Examination — The Primary School Leaving Examination (PSLE) is a national examination taken by all students in Singapore near the end of their sixth year in primary school, which is also their last year in primary school before they leave for secondary school … Wikipedia
Secondary atmosphere — A secondary atmosphere is an atmosphere of a planet that did not form by accretion during the formation of the planet s sun.A secondary atmosphere instead forms from internal volcanic activity, or by accumulation of material from comet… … Wikipedia
Ballyoran Primary School — is a primary school located in Portadown, County Armagh, Northern Ireland. It is situated at the edge of Ballyoran Housing Estate. It is within the Southern Education and Library Board area.*Enrolment: 326 in 1994 95, 343 in 1995 96, 344 in 1996… … Wikipedia
Adobe Atmosphere — Infobox Software name = Adobe Atmosphere developer = Adobe Systems status = Unmaintained latest release version = 1.0.216 latest release date = February 2004 operating system = Microsoft Windows language = English genre = Raster graphics editor… … Wikipedia
International Standard Atmosphere — The International Standard Atmosphere (ISA) is an atmospheric model of how the pressure, temperature, density, and viscosity of the Earth s atmosphere change over a wide range of altitudes. It consists of tables of values at various altitudes,… … Wikipedia
