Scientific Variables

Front

What is an independent variable?

Back

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

Front

What is a dependent variable?

Back

The variable that is measured in an experiment; it is affected by changes in the independent variable.

Front

What is a control variable?

Back

Variables that are kept constant to ensure that the experiment tests only the effect of the independent variable.

Front

Can an experiment have more than one independent variable?

Back

No, an experiment should only have one independent variable to ensure clear results.

Front

What does it mean to measure a variable in an experiment?

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To collect data on the dependent variable to see how it changes in response to the independent variable.

Front

Give an example of an independent variable in an experiment.

Back

The amount of sunlight a plant receives.

Front

Give an example of a dependent variable in an experiment.

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The growth of the plant measured in centimeters.

Front

What is the purpose of a control variable?

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To eliminate alternative explanations for the results of the experiment.

Front

In a study measuring how different fertilizers affect plant growth, what is the independent variable?

Back

The type of fertilizer used.

Front

In a study measuring how different fertilizers affect plant growth, what is the dependent variable?

Back

The height of the plants after a certain period.