| A | B |
|---|
| controlled experiment | is an experiment in which all conditions but one are kept the same |
| control group | in an experiment is a group that has normal conditions or doesn't receive any experimental treatments |
| Experimental group | in an experiment is a group for which scientists change on condition on purpose |
| Independent variable | the variable scientists deliberately change |
| Dependent variable | is the condition that is affected by the independent variable |
| hypothesis | educated guess must be testable |
| Variable | characteristics in an experiment that change or could be changed |
| constants | characteristics in an experiment that are kept unchanged in all trials. |
