Designing & Conducting Experiments
A Grade 12 science worksheet focusing on the principles of experimental design, data analysis, and ethical considerations in scientific research.
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Designing & Conducting Experiments
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Read each question carefully and provide thoughtful, detailed answers. This worksheet assesses your understanding of experimental design, data interpretation, and ethical considerations in scientific research.
1. Which of the following best describes the purpose of a control group in an experiment?
To provide a baseline for comparison.
To receive the experimental treatment.
To introduce confounding variables.
To validate the hypothesis directly.
2. What is the primary reason for blinding in an experimental study?
To reduce the cost of the experiment.
To prevent bias from influencing results.
To simplify data collection procedures.
To increase the sample size.
3. The variable that is manipulated or changed by the researcher is called the variable.
4. A statement that predicts the outcome of an experiment and can be tested is known as a .
5. Briefly explain the difference between accuracy and precision in experimental measurements.
6. A well-designed experiment will always yield results that support the initial hypothesis.
True
False
Match each term on the left with its definition on the right.
7. Independent Variable
a. The outcome measured in an experiment.
8. Dependent Variable
b. A factor kept constant to ensure a fair test.
9. Controlled Variable
c. The factor manipulated by the researcher.
10. Design a simple experiment to test the hypothesis: 'Plants exposed to classical music will grow taller than plants exposed to heavy metal music.' Include the independent variable, dependent variable, at least two controlled variables, and a brief outline of your methodology.