Science Variables

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What is an independent variable?

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

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

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What is a dependent variable?

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The dependent variable is what you measure or observe in an experiment; it 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.

Tags

NGSS.MS-PS2-2

Front

What is the purpose of a hypothesis in an experiment?

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A hypothesis is a testable prediction about the relationship between the independent and dependent variables.

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How do you identify the independent variable in an experiment?

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The independent variable is identified as the one that is changed or controlled by the researcher.

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How do you identify the dependent variable in an experiment?

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The dependent variable is identified as the one that is measured or observed in response to changes in the independent variable.

Tags

NGSS.MS-PS2-2

Front

What is the significance of constants in an experiment?

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Constants are important because they ensure that the experiment is fair and that the results are due to the manipulation of the independent variable.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

Front

What is an example of an independent variable?

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In an experiment testing the effect of sunlight on plant growth, the amount of sunlight is the independent variable.

Tags

NGSS.MS-ETS1-1

Front

What is an example of a dependent variable?

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In an experiment testing the effect of sunlight on plant growth, the height of the plants is the dependent variable.

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

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A control group is used as a standard for comparison; it does not receive the experimental treatment.