The Atmosphere is the air which surrounds the planet Earth. The gases in the air allow plants,
animals and humans to live. The dampness ad movement of the air near the Earth causes our
weather.The atmosphere also sheilds us from the Sun's harmful rays and from falling meteroites.
Air is made up of many gases . The most common are nitrogen(78%) and oxygen (21%).
There are small amounts of other gases, including argon, water vapour and carbon dioxide.
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