VARIABLES#2

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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. 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 factor that is changed or manipulated in an experiment to observe its effect on the dependent 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, if the amount of sunlight is changed to see its effect on plant growth, what is the independent variable?

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The amount of sunlight.

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In an experiment measuring how temperature affects the rate of a chemical reaction, what is the dependent variable?

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The rate of the chemical reaction.

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What is the purpose of a control group in an experiment?

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The control group serves as a standard for comparison, allowing scientists to see the effect of the independent variable.

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If a scientist is testing how different fertilizers affect plant growth, what is the dependent variable?

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The growth of the plants.

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What does it mean to 'control' a variable in an experiment?

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To control a variable means to keep it constant and not allow it to change during the experiment.

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In a study examining the effect of study time on test scores, what is the independent variable?

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The amount of study time.

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What is the significance of replicating an experiment?

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Replicating an experiment helps to verify results and ensure that they are reliable and not due to chance.