Science: Variables, Control Group, Controls

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What is an independent variable?

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The independent variable is the factor that is 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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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 control group?

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A control group is a group in an experiment that does not receive the treatment or independent variable, used as a benchmark to measure how the other tested groups compare.

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Why is it important to have only one independent variable in an experiment?

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Having only one independent variable ensures that any changes in the dependent variable can be directly attributed to that variable, allowing for clear conclusions.

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What are controls in an experiment?

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Controls are the conditions that are kept constant throughout an experiment to ensure that the test results are valid and reliable.

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What is the purpose of a hypothesis in scientific experiments?

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A hypothesis is a testable prediction about the relationship between the independent and dependent variables, guiding the direction of the experiment.

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How does changing the amount of light affect plant growth?

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Changing the amount of light is an independent variable that can influence the growth rate of plants, which is the dependent variable.

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What is the role of 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, and it is essential for testing hypotheses.

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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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What is a scientific experiment?

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A scientific experiment is a structured procedure carried out to investigate a hypothesis by testing the effects of one or more independent variables.