What is the main purpose of repeating experiments?

• A. To waste time.
• B. To verify results and reduce error, and ensure findings are reliable and valid.
• C. To confuse others.
• D. To extend the study without reason.

Answer: (B)

Repeating experiments is all about checking that results are reliable and not just a fluke. When you run the test again, you see if you get similar results, which helps reduce random errors from tiny measurement differences or slight condition changes. With more trials, you can average the data and notice a real pattern, which supports that the finding is valid for the situation you tested. For example, if a fertilizer is said to boost plant growth, repeating the experiment with several plants shows whether growth really increases and isn’t just luck from one plant. Repetition also lets others reproduce the outcome, which makes the conclusion more trustworthy. It’s not about wasting time or extending the study; it’s how scientists confirm what they found.