Experimental Variables

Front

What is an independent variable (IV)?

Back

The variable that you change or manipulate in an experiment.

Front

What is a dependent variable (DV)?

Back

The variable that you measure or observe in an experiment.

Front

What is a control variable (CV)?

Back

A variable that could change but is kept constant to ensure a fair test.

Front

Why is it important to identify the IV and DV in an experiment?

Back

It helps to understand the relationship between the variables and the effect of the IV on the DV.

Front

What is the purpose of a control group in an experiment?

Back

To provide a baseline for comparison against the experimental group.

Front

How does changing the IV affect the DV?

Back

The effect of the IV on the DV is what the experiment aims to investigate.

Front

What is an example of an independent variable in a plant growth experiment?

Back

The amount of water given to the plants.

Front

What is an example of a dependent variable in a temperature experiment?

Back

The speed of rusting.

Front

What is the difference between a control variable and a constant?

Back

A control variable is kept the same throughout the experiment, while a constant is a factor that does not change at all.

Front

Why should only one variable be changed at a time in an experiment?

Back

To ensure that any changes in the DV can be attributed to the IV.