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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
- 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
- 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
Nearly all of Earth's atmosphere (air) is comprised of a mere five gases: nitrogen, oxygen, water vapor, argon, and carbon dioxide Several other compounds are also present in our air in trace amounts
- 10 Interesting Things About Air - NASA Climate Kids
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 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)
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