Answer:
decay chain refers to a series of radioactive decays of different radioactive decay products as a sequential series of transformations. 
Explanation:
 
        
             
        
        
        
Cellular respiration is the metabolic process by which a cell produces usable energy in the form of ATP. In order to accomplish this cells require Glucose and Oxygen to form the reaction which produces ATP and the byproducts of Water and CO2. 
In reality its a complex topic however this is the basic form.
        
             
        
        
        
Answer:
true, i think! im sorry if im wrong
 
        
             
        
        
        
I am certain your answer is true.good luck
        
             
        
        
        
Answer:
Objects able to block all the light are called opaque and will form a shadow. ... The closer an object is to the light source, the larger the shadow it casts. This is because an object closer to the source will block a larger area of the light, increasing its shadow size.
Explanation: