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Air | Composition, Oxygen, Nitrogen | Britannica Air, mixture of gases comprising the Earth’s atmosphere The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are variable in both space and time The atmospheric gases of steady concentration (and their proportions in percentage by volume)
Air - Simple English Wikipedia, the free encyclopedia Air A fan moves air Air is the Earth 's atmosphere Air is a mixture of many gases and tiny dust particles It is the clear gas in which living things live and breathe It has an indefinite shape and volume It has mass and weight, because it is matter The weight of air creates atmospheric pressure There is no air in outer space
AIR Definition Meaning | Dictionary. com Air definition: a mixture of nitrogen, oxygen, and minute amounts of other gases that surrounds the earth and forms its atmosphere See examples of AIR used in a sentence
Whats in the Air? - Center for Science Education Air is a mixture of naturally occurring gases and human-made air pollutants Learn more about these gases and the role they play in our atmosphere
Air - National Geographic Society Air is the invisible mixture of gases that surrounds Earth Air contains important substances, such as oxygen and nitrogen, that most species need to survive
10 Interesting Things About Air - NASA Climate Kids Air is mostly gas Air is all around us, but we can’t see it So what is air, exactly? It’s a mixture of different gases The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen
Properties of Air - Text Version | Glenn Research Center | NASA Air is a mixture of gases, 78% nitrogen and 21% oxygen with traces of water vapor, carbon dioxide, argon, and various other components We usually model air as a uniform (no variation or fluctuation) gas with properties that are averaged from all the individual components