Question

multiple choice questions: choose the correct answer from the choices for each question. 1. which variable does a scientist change in a science experiment? a) dependent variable b) controlled variable c) independent variable d) extra variable

Explanation:

In a science experiment, the independent variable is the one that the scientist manipulates or changes to observe its effect on the dependent variable. Controlled variables are kept constant to ensure accurate results, and there is no such thing as an "extra variable" in the standard experimental - variable terminology.

Answer:

c) Independent variable