Variables

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What is a variable?

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A variable is a factor or condition that can change in an experiment.

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What is an independent variable?

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

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What is a control variable?

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

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What is the purpose of an experiment?

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The purpose of an experiment is to test a hypothesis by manipulating variables and observing the effects.

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How do you identify the independent variable in a question?

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The independent variable is usually the 'cause' or the factor that is being tested or changed.

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How do you identify the dependent variable in a question?

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The dependent variable is usually the 'effect' or the outcome that is being measured.

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What is an example of an independent variable?

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In an experiment testing plant growth, the type of fertilizer used is an independent variable.

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What is an example of a dependent variable?

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In an experiment testing plant growth, the height of the plants after a certain period is a dependent variable.

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What does it mean to control variables?

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Controlling variables means keeping certain factors constant to ensure that the experiment tests only the effects of the independent variable.