Question

a researcher wanted to determine the effect water temperature has on goldfish respiration. the researcher placed the goldfish in three different bowls of water with three different temperatures and counted the goldfishs respirations for two minutes in each setting. what is the independent variable in this scenario? length of time the goldfish water temperature number of respirations

Explanation:

An independent variable is what the researcher manipulates. Here, the researcher changes water temperature to see its effect on goldfish respiration. The length of time is fixed, the goldfish is the subject, and number of respirations is the dependent variable.

Answer:

C. water temperature