Control Group : A group that has nothing done to it; the independent variable is not used or applied to a control group so that it can be used as a comparison. Standard used for comparison in an experiment.
Controlled Variables : Variables that could change, but are not allowed to; also called constants. Factor that stays the same through all phases of an experiment.
Dependent Variable : In an experimental investigation, what is observed and measured; the data. Factor that will be measured in an experiment.
Descriptive Research : Research based on observations
Experimental Research : Investigations that involve variables
Independent Variable : The variable that is changed or tested by the scientist; the thing that is different between experimental groups. Single factor in an experiment that the experimenter changes.