By dating the rocks in the ever-changing crust, as well as neighbors such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years.
 
        
                    
             
        
        
        
All cellular activities that require energy use ATP as a source of energy. 
        
             
        
        
        
Cells are the smallest living thing and they are what form everything living. they are the same as atoms but the living kind?
        
             
        
        
        
C gizzard i think i dont truely know