<span>During the twentieth century, absolute date was added to the relative time scale.  </span>Geologic time scale uses both relative and absolute dating techniques.  <span>Soon after the discovery of radioactivity, geologists used radioactive isotope decay to develop a method for determining absolute ages of rocks</span>
        
             
        
        
        
Answer: A pictograph is a symbol for a word or phrase. 
i hope this helps you :D 
 
        
             
        
        
        
Answer:
 I don't understand the question
 
        
             
        
        
        
The answer is hydrolysis.
The word hydrolysis comes from two Greek words:
hydro - water
lysis - to unbind
So, hydrolysis is a reaction of breaking apart (unbinding) large molecules using water. For example, sucrose or table sugar is disaccharide made of two monosaccharides: fructose and glucose. Hydrolysis of sucrose means that water molecule  break apart sucrose, i.e. unbind fructose and glucose.