In order to study the formation of cancer cells, you should study the life cycle of normal cells as cancer cells are abnormal cells. 
Actually, Normal cells grow, divides and died after an interval of time. And when this process is break down, cancer cells begin to form. They are usually old cells which don't die after their life cycle.
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Answer:The rest of the energy were converted to heat energy
Explanation:
The chemical energy from the cell phone battery converted to both the sound energy and heat energy. No energy wasted, Energy always convert from one form to another form, it can never reduces or increases.
 
        
             
        
        
        
<span>The sun's heat supplies and is used in many earth processes such as life and temperature, maintaining balance. 
1. Photosynthesis and sustain life
2. Climate and temperature
The one component in photosynthesis that can't be recycled but must be constantly available is </span>energy.
Light energy, mostly from sunlight,<span> is the main requirement for photosynthesis to occur. </span>
<span>Photosynthesis is a process wherein light energy is converted into chemical energy. </span>
<span>Chemical energy is generated to support the various activities of a plant or an organism.</span>