The atmosphere is the blanket of air surrounding the Earth, held in place by gravity. It is a mixture of gases in different proportions and plays a crucial role in supporting life, regulating temperature, and shielding the Earth from harmful solar radiation. Understanding its composition helps explain how weather and climate function.
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The atmosphere is the layer of gases surrounding the Earth, held by gravity, and vital for the survival of living beings. It is composed mainly of nitrogen (78%) and oxygen (21%), along with small amounts of argon (0.93%), carbon dioxide (0.04%), and other gases (0.03%) including water vapour and dust particles. Nitrogen and oxygen together make up about 99% of the atmosphere, while the remaining gases, though present in small quantities, play important roles such as trapping heat (carbon dioxide) and supporting cloud formation and precipitation (water vapour). The composition also varies with altitude.
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