Question

If you were to conduct an experiment to answer the question, "Does the volume of a caffeinated drink affect your reaction time?”, what would be the controlled variable?

A type of drink
B reaction times
C number of bubbles
D volume of caffeinated drink

Answer 1

A Type of Drink

Step-by-step explanation:

A controlled variable remains constant throughout the experiment.

In such experiment, you'd test the volume of one single caffeinated drink. You'd have to use the same type of drink every trial.