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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
Air - Simple English Wikipedia, the free encyclopedia Air can be polluted by some gases (such as carbon monoxide, hydrocarbons, and nitrogen oxides), smoke, and ash This air pollution causes various problems including smog, acid rain and global warming
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
10 Interesting Things About Air - NASA Climate Kids 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
Whats in the Air? - Center for Science Education Air is a mixture of gases, most of which are naturally occurring Air also contains a significant amount of human-made air pollutants, including some that are not safe to breathe and some that are causing the climate to warm
AIR Definition Meaning | Dictionary. com The terms air or the air is used generally to refer to the sky or open space outside Real-life example: Airplanes and helicopters are designed to fly in the air, meaning the empty space over the ground
Air - Composition and Molecular Weight - The Engineering ToolBox Air is a mixture of several gases, where the two most dominant components in dry air are 21 vol% oxygen and 78 vol% nitrogen Oxygen has a molar mass of 15 9994 g mol and nitrogen has a molar mass of 14 0067 g mol
What is Air? - BYJUS The air surrounding the earth is called the atmosphere The atmosphere is divided into distinct layers- troposphere, stratosphere, mesosphere, thermosphere, exosphere, and ionosphere