Process Standards - Scientific Variables

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What is a scientific variable?

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A scientific variable is any factor, trait, or condition that can exist in differing amounts or types in an experiment.

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What is an independent variable?

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The independent variable is the variable that is changed or controlled in a scientific 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 variable that is measured and affected in an experiment, responding to changes in the independent variable.

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What does it mean to keep variables constant in an experiment?

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Keeping variables constant means ensuring that certain factors remain unchanged throughout the experiment to ensure a fair test.

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

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A control group provides a baseline for comparison, helping to determine the effect of the independent variable.

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What is the purpose of a hypothesis in scientific research?

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

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How can changing the independent variable affect the dependent variable?

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Changing the independent variable can lead to changes in the dependent variable, as seen in experiments where one factor influences another.

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What is the role of constants in an experiment?

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Constants are factors that are kept the same to ensure that the results are due to the independent variable alone.

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Give an example of an independent variable in an experiment testing plant growth.

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The amount of sunlight each plant receives.

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Give an example of a dependent variable in an experiment testing how temperature affects sugar dissolving.

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The time it takes for the sugar to dissolve.