Q:
         
         
            
               What happens to air when it is heated?
            
                      
         
             Answer
                        When heated any substance, the molecules move apart from each other. Alike in the air the molecules move apart from each other. We know that the warm air is lighter than the cool air. Since after heating air gets warmer, it floats up and the cool air comes down to occupy the warm air place.
          
         
         
         
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