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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. The atmosphere of Earth is the planetary atmosphere of Earth, composed of a layer of gas mixture that surrounds the Earth's planetary surface (both lands and oceans ), known collectively as air, with variable quantities of suspended aerosols and particulates (which create weather features such as clouds and hazes ), all retained by Earth's gravity. The atmosphere serves as a protective buffer ...

  3. 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)

  4. 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.

  5. 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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