Yes and it consists of abiotic factors, river, rocks, etc
        
             
        
        
        
Im pretty sure everything exept sound
        
                    
             
        
        
        
Answer:
the time I spent on a trip was really fun to work and work in your first place and the way 
 
        
             
        
        
        
Answer is thorax...
Hope it helps you...
        
             
        
        
        
Some isotopes, however, decay slowly, and several of these are used as geologic clocks. Dating rocks by these radioactive timekeepers is simple in theory, but the laboratory procedures are complex. <span>All methods rely on the fact that certain elements (particularly uranium and potassium) contain a number of different isotopes whose half-life is exactly known and therefore the relative concentrations of these isotopes within a rock or mineral can measure the age.</span>