Question

1. what is the variable that is changed by the experimenter called?

dependent variable
control variable
independent variable
hypothesis

Explanation:

In an experiment, the independent variable is the factor that the experimenter manipulates or changes. The dependent variable is what is measured and affected by the independent variable. Control variables are kept constant to ensure that only the independent variable impacts the dependent variable. A hypothesis is a proposed explanation for a phenomenon.

Answer:

C. independent variable