[GHS Biology: Scientific Method Quiz #1]
Blue Indophenol dye is used to test substances for the presence of Vitamin C. It turns from blue to clear when a substance contains Vitamin C.

 

Question: Which juice contains the most Vitamin C?

6. Is the solution of Minutemaid Orange Juice considered the

a) Experimental Variable

b) Positive Controlled Variable

c) Negative Controlled Variable

-----------------

Slichter