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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.

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 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).

Air is the name given to the atmosphere of Earth. Air on Earth is primarily composed of 21% oxygen and 78% nitrogen . The remaining 1% consists of carbon dioxide , argon , hydrogen , alongside negligible amounts of other substances.

2024年10月1日 · 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.

2024年7月29日 · 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 …

Since 1946, AIR has worked with federal, state, and local governments to improve the lives of everyday American citizens in the areas of education, health, and the workforce—from evaluating the quality of nursing homes to finding out what works so …

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.

From award-winning director Ben Affleck, AIR reveals the game-changing partnership between a then undiscovered Michael Jordan and Nike’s fledgling basketball division which revolutionized the world of sports and culture with the Air Jordan brand.