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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
- Home | American Institutes for Research
AIR bridges knowledge and action to support the whole child and family We work with educators, students, and policymakers to study and implement evidence-based programs and policies that improve outcomes
- 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 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)
- 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 Below is a summary of the chemical composition of Earth's atmosphere
- 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 | 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
- 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
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