Independent and Dependent Variable Practice

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What is an independent variable?

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

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What is a dependent variable?

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A dependent variable is the 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 by the researcher.

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In an experiment, what does the dependent variable represent?

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

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What is the purpose of a controlled variable?

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A controlled variable is a factor that is kept constant to ensure that any changes in the dependent variable are due to the independent variable.

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Example of an independent variable:

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In a study on plant growth, the amount of sunlight each plant receives is the independent variable.

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Example of a dependent variable:

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In a study on plant growth, the height of the plants after a month is the dependent variable.

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What does it mean when we say a variable is 'controlled'?

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A controlled variable is one that is not allowed to change during the experiment, ensuring a fair test.

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How can you identify the independent variable in a question?

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The independent variable is usually the factor that is being tested or changed, often found in the 'if' part of a hypothesis.

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How can you identify the dependent variable in a question?

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The dependent variable is usually the outcome that is measured, often found in the 'then' part of a hypothesis.