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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 is pioneering AI-driven learning solutions to make workforce training more personalized, scalable, and effective In partnership with Per Scholas and the University of Memphis, AIR piloted Intelligent Tutoring Systems (ITS) to support IT job training—helping workers gain real-world skills faster READ MORE
- 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)
- 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
- Definition of Air in Science - ThoughtCo
Pure air has no discernible scent and no color Air typically contains dust, pollen, and spores; other contaminants are referred to as "air pollution " On another planet—Mars, for example—the so-called air would have a different composition since there is technically no air in space
- All About Air - Cook Museum of Natural Science
Oxygen makes up about 21% of the air we breathe There is a perfect amount of oxygen in the atmosphere: enough for our lungs to absorb into our blood, but not enough to damage our tissues The trillions of cells in our bodies use oxygen to break down molecules absorbed from the food we eat
- Air - Energy Education
Air is a mixture of several gases that is a precious resource and a necessity of life Pure air is completely invisible and odourless, however pollutants in the air can cause it to have a coloured tinge or odour
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