The equivalent mix of gases on another celestial object (such as a planet). 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. 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. The mixture of gases that surrounds the earth and that we breathe
Existing or living in the air Containing or inflated by air. Air is a mixture of gases, most of which are naturally occurring The terms air or the air is used generally to refer to the sky or open space outside Airplanes and helicopters are designed to fly in the air, meaning the empty space over the ground. 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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