Controlled Experiments & Line Graphs

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What is a controlled experiment?

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A controlled experiment is a scientific test where one variable is changed while all others are kept constant to determine the effect of that variable.

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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 observe its effect.

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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 changes in response to 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 intervention, used as a benchmark to measure how the other tested groups compare.

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What is the purpose of using line graphs in experiments?

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Line graphs are used to display data points over time or to show the relationship between two variables, making it easier to identify trends.

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How do you identify the independent variable in an experiment?

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The independent variable is identified as the one that is intentionally changed or varied by the experimenter.

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What is the significance of the dependent variable in an experiment?

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The dependent variable is significant because it provides the data needed to determine the effect of the independent variable.

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What does it mean to have a fair test in an experiment?

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A fair test means that only one variable is changed at a time while all other conditions are kept the same to ensure valid results.

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What is the role of data in a controlled experiment?

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Data is the information collected during an experiment that is used to analyze the results and draw conclusions.

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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., colors, textures), while quantitative data involves numerical measurements (e.g., height, weight).