Controls and variables

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What is an independent variable?

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An independent variable is the variable that is deliberately changed or manipulated in an experiment to test its effects on the dependent variable.

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What is a dependent variable?

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A dependent variable is the variable that is measured or observed in an experiment, which is affected by changes in the independent variable.

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What is a control variable?

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Control variables are the factors that are kept constant throughout an experiment to ensure that any changes in the dependent variable are due to the independent variable.

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In an experiment, what is the purpose of a control group?

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The control group serves as a baseline to compare the effects of the independent variable, as it does not receive the treatment or change being tested.

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How does changing the independent variable affect the dependent variable?

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Changing the independent variable is expected to cause a change in the dependent variable, allowing scientists to observe the relationship between the two.

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What is the role 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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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities (e.g., color, texture), while quantitative data involves numerical measurements (e.g., height, weight).

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Why is it important to repeat experiments?

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Repeating experiments helps to verify results, identify errors, and ensure that findings are reliable and valid.

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What is the scientific method?

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The scientific method is a systematic process for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.

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What is an example of an independent variable in a plant growth experiment?

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The type of fertilizer used is an example of an independent variable in a plant growth experiment.