Independent and dependent variable review

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What is an independent variable?

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An independent variable is the factor that is changed or manipulated in an experiment to observe its effect on the dependent variable.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

Front

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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In an experiment, what does the independent variable represent?

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The independent variable represents the cause or input that is changed to test its effect.

Tags

NGSS.MS-PS3-4

Front

In an experiment, what does the dependent variable represent?

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The dependent variable represents the effect or outcome that is measured in response to changes in the independent variable.

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Identify the independent variable in the experiment: 'How does the amount of water affect plant growth?'

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The amount of water.

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Identify the dependent variable in the experiment: 'How does the amount of water affect plant growth?'

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The growth of the plant.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

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What is the role of controlled variables in an experiment?

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Controlled variables are factors that are kept constant to ensure that the results are due to the independent variable only.

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Why is it important to identify independent and dependent variables in an experiment?

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Identifying these variables helps to clarify the relationship being tested and ensures a structured approach to experimentation.

Tags

NGSS.MS-PS3-4

Front

Example of an independent variable: 'How does temperature affect the rate of a chemical reaction?'

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Temperature.

Tags

NGSS.MS-PS1-4

Front

Example of a dependent variable: 'How does temperature affect the rate of a chemical reaction?'

Back

The rate of the chemical reaction.

Tags

NGSS.MS-PS1-4