Question

What does it mean to control variables in an experiment?

A) to take complete notes about everything you observe in the experiment
B) to not touch anything once you set up the parts of an experiment
C) to used different objects for all of the parts of an experiment
D) to keep as many things the same as possible across the parts of an experiment

Answer 1

D.

Step-by-step explanation:

I assume its D because the controlled variable is what is kept the same throughout the experiment.

Answer 2

D) to keep as many things the same as possible across the parts of an experiment.