Compléter 79-testVersion en ligne 79-test par Farhad Key 1 land pressure heavier entire hot difference Elsewhere gentle mistral sea fierce heats chinook The world's atmosphere is forever on the move . Wind is air in motion . Sometimes air moves slowly , giving a breeze . At other times it moves rapidly creating gales and hurricanes . Gentle or , wind always starts in the same way . As the sun moves through the sky , it up some parts of the and more than others . The air above these spots is warmed , becomes lighter than the surrounding air , and begins to rise . , cool air sinks , because it's . Winds blow because - air squeezed out by sinking , cold air is sucked in under rising , warm air . Winds will blow wherever there is a in air temperature and pressure , always flowing from high to low . Some winds blow in one place , and have a local name ? North America's and France's . Others are part of a huge circulation pattern that sends winds over the globe .
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