Question

PLEASE ANSWER.

Why is it important to only have one independent variable?


(A)There is no reason why.


(B)Because it has always been done that way.


(C)Because if you are changing multiple independent variables, it would be difficult to determine which independent variable is causing the change in the dependent variable.


(D)You can have multiple independent variables.

Answer 1

As long as the experiment is repeated a sufficient number of times, it does not matter how many variables are used. Yes, an experiment should test only one variable at a time. This ensures that the experimental outcome is clearly due to one identifiable factor.