Question

15wanted to know whether the eating behavior of goldfish is affected by music. He set up a fish tank. Every day played music for the fish and measured how much fish ate. What is missing from this experiment?

A. a control groups
B. a measurable result
C. different types of fish
D. an outcome variable (dependent variable)

Answer 1

A

Step-by-step explanation:

A is correct; control group is missing as he would want to know how the goldfish ate normally without music

B is incorrect; amount that the fish ate is a measurable result

C is incorrect; the experiment is only about goldfish

D is incorrect; the amount of food that the fish ate is the dependent variable