In a scientific experiment, what is the role of the independent variable?

Question

Responses

It is the variable that cannot be controlled or measured during the experiment.
It is the variable that cannot be controlled or measured during the experiment.

It is the variable that is kept constant throughout the experiment.
It is the variable that is kept constant throughout the experiment.

It is the variable that is manipulated or changed by the researcher to observe its effect on the dependent variable.

Answer 1

The correct response is:

It is the variable that is manipulated or changed by the researcher to observe its effect on the dependent variable.

In an experiment, the independent variable is the factor that is intentionally varied to test its effect on another variable, known as the dependent variable.