QuestionMay 29, 2025

14. Which of the following is an example when an uncontrolled experiment is best? When testing plant growth When testing the effect of water on a lawn When working with the human body When testing the effect of sugar on a starch

14. Which of the following is an example when an uncontrolled experiment is best? When testing plant growth When testing the effect of water on a lawn When working with the human body When testing the effect of sugar on a starch
14. Which of the following is an example when an uncontrolled experiment is best?
When testing plant growth
When testing the effect of water on a lawn
When working with the human body
When testing the effect of sugar on a starch

Solution
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Answer

When working with the human body Explanation 1. Identify the nature of uncontrolled experiments Uncontrolled experiments are best when variables cannot be easily controlled or isolated. 2. Analyze each option - Testing plant growth: Variables like sunlight, soil, and water can be controlled. - Testing the effect of water on a lawn: Water application can be controlled. - Working with the human body: Complex systems make control difficult; often requires observational studies. - Testing the effect of sugar on starch: Can be controlled in a lab setting. 3. Determine the best fit for an uncontrolled experiment The human body is complex and hard to control all variables, making it suitable for uncontrolled experiments.

Explanation

1. Identify the nature of uncontrolled experiments<br /> Uncontrolled experiments are best when variables cannot be easily controlled or isolated.<br />2. Analyze each option<br /> - Testing plant growth: Variables like sunlight, soil, and water can be controlled.<br /> - Testing the effect of water on a lawn: Water application can be controlled.<br /> - Working with the human body: Complex systems make control difficult; often requires observational studies.<br /> - Testing the effect of sugar on starch: Can be controlled in a lab setting.<br />3. Determine the best fit for an uncontrolled experiment<br /> The human body is complex and hard to control all variables, making it suitable for uncontrolled experiments.
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