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- 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)
- Atmosphere of Earth - Wikipedia
The atmosphere of Earth consists of a layer of mixed gas (commonly referred to as air) that is retained by gravity, surrounding the Earth 's surface It contains variable quantities of suspended aerosols and particulates that create weather features such as clouds and hazes
- 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
- Home | American Institutes for Research
AIR conducts rigorous research and evaluations that provide important information about the effectiveness of programs and policies in the U S and across the globe
- 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
- 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 | definition in the Cambridge English Dictionary
AIR meaning: 1 the mixture of gases that surrounds the earth and that we breathe: 2 the space above the… Learn more
- Air - definition of air by The Free Dictionary
1 Of or relating to the air or the movement of air: an air tube 2 Existing or living in the air; aerial 3 Powered by compressed air: an air horn 4 Containing or inflated by air
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