| A | B |
| hypothesis | A prediction that can be tested |
| control group | The group that serves as a baseline compared to the experimental group. This group does not get the treatment. |
| experimental group | The group(s) in which the independent variable is changed. The group that is treated differently. |
| constants | The variables in the experiment that are identical for all groups |
| independent variable = experimental variable | The one variable in the experiment that you change for the experimental groups. |
| dependent variable | The variable in the experiment that you measure throughout the experiment; depends on the independent variable. |
| scientific method | a set of steps used to find answers to questions |
| theory | an idea that explains something based on repeated scientific evidence |