Variables

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What is a variable in an experiment?

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A 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 factor 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 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 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.

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Why is it important to repeat trials in an experiment?

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Repeating trials helps to ensure that the results are reliable and not due to random chance.

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How many times should each trial in an experiment typically be repeated?

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Each trial should typically be repeated at least 3 times.

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What is the purpose of an experiment?

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The purpose of an experiment is to test a hypothesis by manipulating variables and observing the outcomes.

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What is a hypothesis?

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A hypothesis is a testable prediction about the relationship between two or more variables.

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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities, while quantitative data involves numbers and measurements.

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What is an example of an independent variable in an experiment?

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In an experiment testing how different types of fertilizer affect plant growth, the type of fertilizer is the independent variable.