Experimental Variables

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What is a dependent variable?

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The dependent variable is the variable that is measured or tested in an experiment. It is affected by changes in the independent variable.

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What is an independent variable?

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The independent variable is the variable that is changed or manipulated in an experiment. It is what the experimenter tests to see its effect.

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What are constants in an experiment?

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Constants are the parts of the experiment that must be kept the same to ensure a fair test.

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What is the purpose of a control variable?

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Control variables are factors that are kept constant to prevent them from influencing the outcome of the experiment.

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How do you identify the dependent variable in an experiment?

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The dependent variable can be identified by asking what is being measured or observed as a result of changing the independent variable.

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How do you identify the independent variable in an experiment?

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The independent variable can be identified by asking what is being changed or manipulated in the experiment.

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What is an example of a dependent variable?

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In an experiment testing the effect of sunlight on plant growth, the height of the plants is the dependent variable.

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What is an example of an independent variable?

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

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Why is it important to have constants in an experiment?

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Constants are important because they ensure that the experiment is fair and that the results are due to the independent variable alone.

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What is the relationship between independent and dependent variables?

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The independent variable is manipulated to observe its effect on the dependent variable.