Scientific method and variables

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What is the scientific method?

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A systematic process used for scientific investigation, involving observation, hypothesis formulation, experimentation, and conclusion.

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What is an independent variable?

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

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Why should an experiment have only one independent variable?

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To ensure that any changes in the dependent variable can be directly attributed to the manipulation of the independent variable.

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What is a control variable?

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Variables that are kept constant throughout an experiment to ensure that the results are valid.

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What is the purpose of a hypothesis?

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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, while quantitative data involves numerical measurements.

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What is a bar graph used for?

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To compare different groups or categories of data.

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What is a pie chart?

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A circular graph that represents data as slices of a pie, showing the proportion of each category relative to the whole.

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What is a histogram?

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A type of bar graph that represents the frequency distribution of numerical data.