Answer:
A. Type of soil
Explanation:
A control experiment is the one that is used to checkmate the real experiment.
In this case, the fourth jar that contains the mixture of all the types of the soil is considered as the control experiment.
In a nutshell, it should be generally understood here that the type of soil serves as the control for the experiment.
 
        
                    
             
        
        
        
Answer: Hey There! ^^
The reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn
Explanation:
 ! ^^ 
 
        
             
        
        
        
Answer:
A closed circuit doesn't allow the flow of electrons. an open circuit does. example: if you turn off a switch in your house. you 'broke the circuit it is closed.
 
        
             
        
        
        
A stored form of carbohydrate in animals' muscle and liver is glycogen. 
Glycogen is a polysaccharide (starch) made of repeating units of glucoses bonded together.
        
             
        
        
        
Answer:
Aerobic respiration needs oxygen to occur, while anaerobic does not.
Explanation:
This presence of oxygen determines what products will be created. During aerobic respiration, carbon dioxide, water, and ATP are produced. During anaerobic respiration, lactic acid, ethanol, and ATP are created.