Experimental Design

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What is an independent variable?

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The independent variable is the factor in an experiment that is changed or manipulated by the scientist to observe its effect on the dependent variable.

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What is a dependent variable?

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The dependent variable is the factor in an experiment that is measured or observed to see how it 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 in an experiment that is kept constant to ensure that the results are due to the independent variable.

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What is the purpose 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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What is an experiment?

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An experiment is a scientific procedure undertaken to test a hypothesis by manipulating variables and observing the outcomes.

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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 for comparison.

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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 reliability and accuracy of the data.

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What is a scientific variable?

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A scientific variable is any factor, trait, or condition that can exist in differing amounts or types in an experiment.

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What is the significance of a graph in experimental design?

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Graphs visually represent data, making it easier to identify trends, patterns, and relationships between variables.