Variables

Front

What is a variable?

Back

A variable is a symbol or letter that represents a value that can change or vary in an experiment.

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What is an independent variable?

Back

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

Front

What is a dependent variable?

Back

A dependent variable is the variable that is measured or tested in an experiment, and it responds to changes in the independent variable.

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What is a control variable?

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

Front

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.

Front

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.

Front

In the question 'Does the type of fertilizer affect plant growth?', what is the independent variable?

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The independent variable is the type of fertilizer.

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In the question 'How does the amount of sunlight affect the growth of a plant?', what is the dependent variable?

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The dependent variable is the growth of the plant.

Front

What is the difference between a constant and a control variable?

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A constant is a value that does not change, while a control variable is kept the same throughout the experiment to ensure valid results.

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Why is it important to have a control group in an experiment?

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A control group is important because it allows for comparison against the experimental group, helping to determine the effect of the independent variable.