| The height of a mountain. | 
              
 | 
            
            
              | The minimum air temperature
                outside last night. | 
              
 | 
            
            
              | The number of boys in the
                class. | 
              
 | 
            
            
              | The thickness of a piece of
                paper. | 
              
 | 
            
            
              | The gear a car is in when it
                drives up the main street. | 
              
 | 
            
            
              | The musical note being
                played on a piano by one finger at any one moment in a piano
                recital. | 
              
 | 
            
            
              | The speed of a car as it
                passes a traffic light. | 
              
 |