Lesson 5 Experimental Design and Variables

Front

What is a dependent variable?

Back

The dependent variable is the outcome or data that is measured in an experiment. It is affected by changes in the independent variable.

Front

What is an independent variable?

Back

The independent variable is the factor that is changed or controlled in an experiment to test its effects on the dependent 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 the experiment 'Does eating breakfast improve test scores?', what is the dependent variable?

Back

The grade you got on the test.

Front

In the study 'How long you sleep affects your test score', what is the controlled variable?

Back

Place you sleep.

Front

In the experiment 'Which type of metal conducts heat faster?', what is the independent variable?

Back

Types of metal.

Front

In the study 'Do different types of tires affect the breaking distance of a car?', what is the independent variable?

Back

Type of tire.

Front

How many variables should you change in an experiment?

Back

1.

Front

What is the purpose of an experiment?

Back

To test a hypothesis by changing one variable and observing the effect on another variable.

Front

What is a hypothesis?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.