A group or sample that is used as a standard of comparison
Experimental Group
The group in an experiment that includes the variable being tested
Dependent Variable
The variable in an experiment that is changed as a result of another
Hypothesis
A proposed solution to a problem
Independent Variable
The variable in an experiment that is changed on purpose
Constant
Any factor that is not allowed to change
Theory
A set of statements or principles devised to explain a group of facts or phenomena, especially one that has been repeatedly tested or is widely accepted and can be used to make predictions about natural phenomena.