Labels:bulletin board | earth | reckoner | sky OCR: HE TWO MAIN GASES that make up air are oxygen and nitrogen. Like all gases, these become liquid at very low temperatures oxygen 07 4F -183C and nitrogen at -196C Ata temperature 01 -328F -200 c 31 becomes liquid. Air is cooled to this tem perature in industry in to separate nitrogen and oxygen. the temperature gradually raised above 328F -200 C) the nitrogen changes back into gas first, and can be collected separately COMPRESSED AIR Nitrogen and oxygen take up much less room in their liquid form than they do in their gaseous form, and can be transported more easily Gases are normally con verted into liquids compressing, or squashing, them undet high pressure. They are then stored and trans ported in cylinders. When the liquids are released from the cylinders, they then become gases again O ...
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