P638 CEEFAX 2 638 Fri 28 Feb 22:20/1,
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        CFACT FILE - CLOUDS             
                                        
 * Clo ds ar  mad  up of b  lion        
   tiny droplets of ice or water.       
                                        
 * Clouds are condensation, formed      
   when warm air rises and is cooled    
   below a certain temperature, called  
   its dew point.                       
                                        
 * Thjti are three basic families oe    
   clouds, called cirrus ('c4rl of      
   hair'), stratus ('layer'), and       
   cumulus ('heap').                    
                                        
 * A cumulus cloud can hold 1,000       
   tonnes of watit.                     
                                        
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