Question

which statement best describes the variables in a controlled experiment?
○ the independent variable is changed to see its effect on the dependent variable while all other conditions are unchanged.
○ the dependent variable is changed to see its effect on the independent variable while all other conditions are unchanged.
○ the independent variable is allowed to change, and the dependent variable is held constant to see what other conditions show a relationship.
○ the dependent variable is allowed to change, and the independent variable is held constant to see what other conditions show a relationship. .

Explanation:

In a controlled experiment, the independent variable is manipulated to observe its effect on the dependent variable, with all other conditions kept constant.

Answer:

The independent variable is changed to see its effect on the dependent variable while all other conditions are unchanged.