Variables

Question 1

Extraneous variables

Answer 1

Any variable other than the independent variable that may affect the dependent variable and therefore influence the results of an experiment in an unwanted way.

Question 2

Confounding variables

Answer 2

Variables that have affected the results, apart from the independent variable. It may have been an extraneous variable that has not been controlled for, or it can be a type of variable that cannot be controlled for.

Question 3

Controlled variables

Answer 3

Variables that a researcher holds constant in an investigation.

Question 4

Independent variables

Answer 4

The variable for which quantities are manipulated, selected or changed by the researcher, and the variable that is assumed to have a direct effect on the dependent variable.

X axis of the graph

Question 5

Dependent variables

Answer 5

The variable the researcher measures.

Y axis of the graph