Answer:
That would be option D. A motor. 
Explanation:
 
        
             
        
        
        
Answer:
The combination of ideas to form a theory
Explanation:
 
        
                    
             
        
        
        
C. Dependent variable
The independent variable is what you want to change (ex amount of light given to plants)
The dependent variable is what changes because of the independent variable (ex the height of the plants)
So Independent is what you change, Dependent is what you measure
        
             
        
        
        
Answer:
it will bonce because the vinegar absorbs into the eff and eats away at the hardness its just like water if you have ever boiled an egg the water gets inside a cooks the egg and this can be tested   
Explanation: