Question

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

• A. To validate the overall experimental design and methodology.
• B. To provide a basis for comparison, demonstrating what happens without the variable being tested.
• C. To demonstrate the direct impact and effectiveness of the independent variable.
• D. To ensure consistency and reduce external biases across all experimental conditions.

Answer 1

Answer:

B. To provide a basis for comparison, demonstrating what happens without the variable being tested.

• The control group allows a scientist to compare the results with and without the independent variable, isolating its effect and validating the findings.