Why is it important to make measurements using a standard in scientific experiments?

• A. It eliminates the need for calibration of instruments.
• B. It allows scientists to use any unit they prefer for convenience.
• C. It guarantees that all measurements are perfectly accurate.
• D. It ensures consistency and comparability of results across different experiments.

Answer: (D)

Verified step by step guidance

1. Understand that in scientific experiments, measurements must be reliable and reproducible to be meaningful.
2. Recognize that using a standard means employing a universally accepted reference for measurement units, such as the meter for length or the second for time.
3. Realize that this standardization allows scientists from different locations and times to compare their results directly without confusion or conversion errors.
4. Know that without a standard, measurements could vary widely due to differences in instruments or personal methods, making data inconsistent and less trustworthy.
5. Conclude that the primary importance of using a standard is to ensure consistency and comparability of results across different experiments, which is fundamental for scientific progress.