Question

A scientist stated the following hypothesis:
If I change the temperature of water in a fish tank, it will affect fish breathing rate.
Identify the independent variable:
fish breathing rate
type of fish
type of fish tank
temperature of water

Answer 1

Hi there!

The answer would be D. Temperature of water.

The temperature of water is being changed and controlled in this experiment to test the effects of the fishes breathing rates (dependent variable) .

Hope this helps !