Gap Fill - Cold Air - Level 6


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   air      circumstances      degree      fundamental      heat      humid      school      tropical      vapour      worse  

Paragraph 1

Most of us learn at that warm air rises and cool sinks. This has always appeared to be a principle of science. However, a study from the University of California, Davis found that there are in which cool air rises. Researchers discovered that in atmospheres, cold air rises because of the lightness of water vapour. Apparently, in warmer and more climates, water particles become more buoyant and can help cooler air rise. Lead researcher Dr Da Yang said: "Water has a buoyancy effect which helps release the of the atmosphere to space and reduce the of warming. Without this lightness of water vapour, the climate warming would be even ."

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