There are three main variables: independent variable ...

There are three main variables: independent variable, dependent variable and controlled variables.

Independent Dependent Controlled

Example: a car going down different surfaces.

variable

variable variables Independent variable: the surface of the slope rug, bubble

What you can What you Things you wrap and wood.

decide to

observe or keep the

change in an measure same ?do

experiment.

not

Dependent variable: the time it takes for the car to go down the slope.

change.

Controlled variable: the height of the slope, the car, the unit

of time e.g. minutes and the length of the slope.

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