Independent and Dependent Variables

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What is an independent variable in an experiment?

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An independent variable is the one factor that is changed or manipulated in an experiment to observe its effect on the dependent variable.

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What is a dependent variable in an experiment?

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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.

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In the context of an experiment, what does it mean to manipulate a variable?

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To manipulate a variable means to intentionally change it in order to observe the effects of that change on another variable.

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What is the relationship between independent and dependent variables?

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The independent variable is the cause that is manipulated, while the dependent variable is the effect that is measured.

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How can you identify the independent variable in a research 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 research question?

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

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What is an example of an independent variable in a study about plant growth?

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The amount of sunlight each plant receives could be an independent variable.

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What is an example of a dependent variable in a study about plant growth?

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The height of the plants could be a dependent variable.

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Why is it important to control variables in an experiment?

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Controlling variables is important to ensure that the results are due to the manipulation of the independent variable and not other factors.

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What is a controlled variable?

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A controlled variable is a factor that is kept constant throughout an experiment to ensure a fair test.