Variable
A factor that can change in an experiment
constant
A value that does not change
independent variable
The experimental factor that is manipulated; the variable whose effect is being studied.
dependent variable
The outcome factor; the variable that may change in response to manipulations of the independent variable.
experimental group
the group in an experiment that receives the variable being tested
control group
the group that does not receive the experimental treatment.
qualitative data
Information describing color, odor, shape, or some other physical characteristic
quantitative data
numerical data