Experimental Variables

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What is an independent variable?

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The independent variable is the 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?

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The 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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What is a control group?

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A control group is a group in an experiment that does not receive the treatment or independent variable, used as a benchmark to measure how the other tested subjects do.

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What are controlled variables?

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Controlled variables are factors that are kept constant throughout an experiment to ensure that any changes in the dependent variable are due to the independent variable.

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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 one or more independent variables and observing the effect on the dependent variable.

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How does one 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 in response to changes in the independent variable.

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What is the significance of having a control group in an experiment?

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The control group provides a baseline for comparison, helping to determine if the independent variable has an effect.

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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, which is measured.

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

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Controlled variables are important to ensure that the experiment is fair and that the results are valid, isolating the effect of the independent variable.

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

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An example of an independent variable in a plant growth experiment could be the amount of sunlight the plants receive.