Variables

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What is a variable?

Back

A variable is a factor or condition that can change in an experiment.

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What is an independent variable?

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The independent variable is the one 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 are controlled variables?

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Controlled variables are the factors that are kept constant throughout an experiment to ensure a fair test.

Front

In Janet's coffee experiment, what is the dependent variable?

Back

Productivity.

Front

In the experiment about tall people jumping, what is the dependent variable?

Back

How far the person jumps.

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What is the independent variable in Mr. Pransky's tennis ball experiment?

Back

The different surfaces.

Front

What is the purpose of controlled variables in an experiment?

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To ensure that the test is fair and that the results are due to the independent variable.

Front

Give an example of a controlled variable in a plant growth experiment.

Back

Amount of soil, amount of sunlight, and type of music.

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Why is it important to identify variables in an experiment?

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Identifying variables helps to understand the relationship between different factors and ensures accurate results.