Scientific Variables

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What is an independent variable in an experiment?

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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.

Tags

NGSS.MS-PS2-2

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What is a dependent variable in an experiment?

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The 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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What is a constant or control in a scientific experiment?

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Constants or controls are all the factors that remain the same throughout an experiment to ensure that the results are valid.

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True or False: An experiment can have more than one independent variable.

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False. An experiment should only have one independent variable to maintain clarity in results.

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In the context of an experiment, what does the term 'hypothesis' refer to?

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

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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 baseline to compare the effects of the independent variable, helping to validate the results.

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How can you identify the independent variable in a given experiment?

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The independent variable is usually the one that is changed or manipulated by the researcher, often found in the 'if' part of a hypothesis.

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What is the significance of having a well-defined hypothesis in an experiment?

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A well-defined hypothesis provides a clear focus for the experiment and guides the research process.

Tags

NGSS.HS-LS1-3

NGSS.HS-PS1-3

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What is the relationship between independent and dependent variables?

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The independent variable is manipulated to observe its effect on the dependent variable, which is measured.

Tags

NGSS.MS-PS2-2

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Why is it important to keep constants in an experiment?

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Keeping constants ensures that the experiment is fair and that the results are due to the manipulation of the independent variable.