General Science, Mathematics, and Technology


What is a control group?

A control group is the experimental group tested without changing the variable. For example, to determine the effect of temperature on seed germination, one group of seeds may be heated to a certain temperature. The percent of seeds in this group that germinates and the time it takes them to germinate is then compared to another group of seeds (the control group) that has not been heated. All other variables, such as light and water, will remain the same for each group.


This is a web preview of the "The Handy Science Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App