Question

23. Christina wanted to know whether the eating behavior of goldfish is affected by music. She set up a fish

tank. Every day, she played music for the fish and measured how much the fish ate. What is Christina

missing from this experiment?

A. a control group

B. a measurable result

C. a dependent variable

D. different types of fish

Answer 1

a control group

Step-by-step explanation:

To have a succsessful experiment you need something to compare your variable to.