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  1. 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 . Earth's atmosphere is composed of about 78 percent nitrogen, 21 ...

  2. Jun 28, 2024 · 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. The atmospheric gases of steady concentration (and their proportions in percentage by volume) are as follows: nitrogen (N 2) 78.084. oxygen (O 2)

  3. Oct 19, 2023 · 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.

  4. AIR meaning: 1. the mixture of gases that surrounds the earth and that we breathe: 2. the space above the…. Learn more.

  5. air: [verb] to expose to the air for drying, purifying, or refreshing : ventilate.

  6. AIR is a thrilling documentary that explores how Michael Jordan and Nike created the iconic Air Jordan brand. Find out why critics and fans are raving about this award-winning film.

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