Question

Eva is performing an experiment to determine which type of disinfectant kills the most bacteria. She has six plates of the same kind and amount of bacteria. She adds one of five different kinds of disinfectant to each plate and leaves one plate without any disinfectant as a control. What role does the independent variable play in this experiment? A. The amount of bacteria killed determines the type of bacteria used. B. The amount of bacteria killed determines the type of disinfectant used. C. The type of disinfectant determines the amount of bacteria killed. D. The type of disinfectant used determines the type of bacteria used.

Answer 1

Hello There!

It is C. The type of disinfectant determines the amount of bacteria killed.

Hope This Helps You!
Good Luck :) 

- Hannah ❤

Answer 2

Answer: Option C

Explanation:

The independent variable can be defined as the variable that is used to find the result of the experiment.

It can be changed by the experimenter who is performing the experiment to see its effect on the dependent variable.

Here, in the given experiment the type of disinfectant used determines the amount of bacteria killed.

So, the correct answer is option C