Independent, Dependent, and Controlled Variables

Front

What is an independent variable?

Back

An independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What is a dependent variable?

Back

A dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

Front

What is a controlled variable?

Back

A controlled variable is a factor that is kept constant throughout an experiment to ensure that the results are valid.

Front

In Ben's helicopter experiment, what is the independent variable?

Back

Wing Length.

Front

In a plant growth experiment, what is the independent variable when using different fertilizers?

Back

Fertilizer type.

Front

In the question about TV watching and test grades, what is the dependent variable?

Back

Student's test grades.

Front

In the gasoline experiment, what is the independent variable?

Back

Type of gasoline.

Front

In the shoe experiment during a dash, what is the dependent variable?

Back

Speed of the runner.

Front

Why is it important to control variables in an experiment?

Back

Controlling variables ensures that the experiment tests only the effect of the independent variable on the dependent variable.

Front

What is the relationship between independent and dependent variables?

Back

The independent variable is manipulated to observe its effect on the dependent variable.