ES Semester 1 menu Types of variables

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What is an independent variable?

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An independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

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What is a dependent variable?

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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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What is a controlled variable?

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

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In an experiment, what is the purpose of the independent variable?

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The purpose of the independent variable is to determine its effect on the dependent variable.

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What is the relationship between independent and dependent variables?

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The independent variable is manipulated to observe how it affects the dependent variable.

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Why is it important to keep controlled variables constant?

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Keeping controlled variables constant ensures that the experiment is fair and that the results are due to the manipulation 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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The amount of sunlight the plants receive.

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What is an example of a dependent variable in a study measuring tire tread effects on braking distance?

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The braking distance of the car.

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What is the significance of having multiple trials in an experiment?

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Multiple trials help to ensure the reliability and accuracy of the results by minimizing the impact of random errors.

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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities (e.g., color, texture), while quantitative data involves numerical measurements (e.g., height, weight).