Flashcard: NYS Lab Making Connections

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What is a dependent variable in an experiment?

Back

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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In the context of an experiment, what is an independent variable?

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The independent variable is the factor that is manipulated or changed by the experimenter to observe its effect on the dependent variable.

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What does it mean to increase the validity of an experiment?

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Increasing the validity of an experiment means improving the accuracy and reliability of the results, often by increasing sample size or controlling variables.

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What is the purpose of a control group in an experiment?

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A control group is used as a standard for comparison; it does not receive the experimental treatment and helps to isolate the effects of the independent variable.

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How can exercise affect heart rate?

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Exercise typically increases heart rate as the body requires more oxygen and nutrients to fuel muscles during physical activity.

Front

What is the significance of recording pulse rate in beats per minute?

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Recording pulse rate in beats per minute provides a standardized measure of heart activity, allowing for easy comparison before, during, and after exercise.

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What is the relationship between exercise duration and heart rate?

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Generally, as the duration of exercise increases, heart rate also increases, reflecting the body's increased demand for oxygen.

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What is a hypothesis in scientific research?

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A hypothesis is a testable statement or prediction about the relationship between two or more variables.

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Why is it important to have a large sample size in experiments?

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A large sample size helps to ensure that the results are representative of the population and reduces the impact of outliers.

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What is the role of data collection in experiments?

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Data collection is essential for analyzing results, drawing conclusions, and determining whether the hypothesis is supported.