Question

a factor detemined by the conditions set up in an experiment controlled variable dependent variable constant variable independent variable

Explanation:

In an experiment, the independent variable is the factor that is manipulated or determined by the experimenter (set up in the experiment) to observe its effect on the dependent variable. Controlled variables are kept constant, constant variables are unchanging, and dependent variables depend on the independent variable. So the factor determined by the experiment's conditions (the one being manipulated) is the independent variable.

Answer:

independent variable