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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
Atmosphere of Earth - Wikipedia Known collectively as air, it contains variable quantities of suspended aerosols and particulates that create weather features such as clouds and hazes The atmosphere serves as a protective buffer between the Earth's surface and outer space
AirNow. gov AirNow is your one-stop source for air quality data Our recently redesigned site highlights air quality in your local area first, while still providing air quality information at state, national, and world views
The Chemical Composition of Air - ThoughtCo Air pollution varies according to geographical location and also where it occurs in the air column Pollutants include chemicals, particulates like dust and ash, and biological matter, like pollen and bacteria
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
Air - Simple English Wikipedia, the free encyclopedia 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 - Merriam-Webster The meaning of AIR is the mixture of invisible odorless tasteless gases (such as nitrogen and oxygen) that surrounds the earth; also : the equivalent mix of gases on another celestial object (such as a planet)
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 Air isn’t just gas
Whats in the Air? - Center for Science Education Air is a mixture of gases, most of which are naturally occurring Air also contains a significant amount of human-made air pollutants, including some that are not safe to breathe and some that are causing the climate to warm