Identifying Variables

Question 1

Independent (or manipulated) variable:

Answer 1

the variable the scientist intentionaly changes. (There is always only ONE in each experiment)

Question 2

Dependent (or responding) variable:

Answer 2

the variable that is measured by the scientist to gather data.

Question 3

Constant or controlled variable:

Answer 3

part of the experiment that is kept the SAME

Question 4

Control group:

Answer 4

the group is an experiment that does not receive treatment by the researchers and is then used to compare the others tested subjects to. (Not all experiment have control groups.

Question 5

There __ __ _____ _____. If an experiment is to be useful, ____ ___ ______ ___ ___ _____ ____ ____ _______ _____. All other variables must be controlled (constant) throughout all parts of the experiment. If more than one variable is altered (changed), the result of an experiment can not be interpreted with any validity.

Answer 5

can be several constants

only one variable at a tie can be manipulated intentionally