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, affecting the outcome.

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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 a control in an experiment?

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The purpose of a control is to provide a standard for comparison, helping to isolate the effects of the independent variable.

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How do you identify the dependent variable in a question?

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

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How do you identify the independent variable in a question?

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The independent variable is the factor that is manipulated or changed by the experimenter.

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What is the relationship between independent and dependent variables?

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The independent variable is what you change, while the dependent variable is what you measure as a result of that change.

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Why is it important to have control variables in an experiment?

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Control variables are important to ensure that the experiment is fair and that the results are due to the independent variable alone.

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Can there be more than one independent variable in an experiment?

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Yes, but it can complicate the results, making it harder to determine which variable is affecting the dependent variable.