Answer:
Control group remains unchanged.
Explanation:
For example if you are trying to see if watering plants with Pepsi is better.
Your experiment plant would get watered with Pepsi.
Your control plant would get watered with water. (Control groups serve as a reference to compare in the experiment)
The water turns the turbine and that generates elecricity
(C. The dinosaurs became extinct after the Cretaceous time period, after living on Earth for about 165 Million Years
The glass is half empty is an example of non-volume.
