*what is air???????????
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A mixture of various gases such as nitrogen ,oxygen,carbon dioxide, water vapor and few other gases is called air.
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ᴛʜᴇ ᴀᴛᴍᴏsᴘʜᴇʀᴇ ᴏғ ᴇᴀʀᴛʜ, ᴄᴏᴍᴍᴏɴʟʏ ᴋɴᴏᴡɴ ᴀs ᴀɪʀ, ɪs ᴛʜᴇ ʟᴀʏᴇʀ ᴏғ ɢᴀsᴇs ʀᴇᴛᴀɪɴᴇᴅ ʙʏ ᴇᴀʀᴛʜ's ɢʀᴀᴠɪᴛʏ ᴛʜᴀᴛ sᴜʀʀᴏᴜɴᴅs ᴛʜᴇ ᴘʟᴀɴᴇᴛ ᴀɴᴅ ғᴏʀᴍs ɪᴛs ᴘʟᴀɴᴇᴛᴀʀʏ ᴀᴛᴍᴏsᴘʜᴇʀᴇ.
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