P638 CEEFAX 2 638 Tue 04 Mar 2p:00/01       FACT FILE - CLOUDS * Clouds are made up of billions of tiny droplets of ice or water. * Clouds are condensation, formed wPen warm air rises and is cooled below a certain temperature, called its dew point. * There are three basic families of clouds, called cirrus ('curl of hair'), stratus ('layer'), and cumulus ('heap'). * A cumulus cloud can hold 1,p00 tonnes of water. TV/radio 600 News 101 Weather 400 Eeatures 54p Sport 14p Main menu 100
P638 CEEFAX 2 638 Tue 04 Mar 2p:00/00  3k   'k AB   ACT HLE CL UD * Clouds are mad— up of billions of tiny droplets of ice or watar. * Clouds are condensation, formed when warm air rises and is coole— below a certain temperature, called its dew point. * There are t@ree basic families of clouds, called cirrus ('curl of hair'), stratus ('layer'), and caHulus ('heap'). * A cumulus cloud can hold 1,000 tonnes of watar. Features 540 Sport 140 Main menu 100