Independent and Dependent Variables

Front

What is an independent variable?

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

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What is a dependent variable?

Back

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

Front

In an experiment, what does the independent variable represent?

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The independent variable represents the cause or input that is manipulated to observe its effect.

Front

In an experiment, what does the dependent variable represent?

Back

The dependent variable represents the effect or outcome that is measured in response to changes in the independent variable.

Front

Identify the independent variable: 'How does the amount of sunlight affect plant growth?'

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Amount of sunlight.

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Identify the dependent variable: 'How does the amount of sunlight affect plant growth?'

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Plant growth.

Front

What does it mean if a variable is 'controlled' in an experiment?

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A controlled variable is kept constant to ensure that the results are due to the independent variable.

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Why is it important to identify independent and dependent variables in an experiment?

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Identifying these variables helps to clarify the relationship being tested and ensures accurate data collection.

Front

Example of an independent variable: 'How does temperature affect the rate of a chemical reaction?'

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Temperature.

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Example of a dependent variable: 'How does temperature affect the rate of a chemical reaction?'

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Rate of the chemical reaction.