What term describes closeness of a measured value to a standard or known value?

• A. Precision
• B. Length
• C. Accuracy
• D. Chemical Change

Answer: (C)

Accuracy is the term for how close a measurement is to a known value. It tells you how correct your result is relative to the standard. For example, if the true length is 10.0 cm, a measurement of 9.95 cm is more accurate than 9.70 cm. Precision, on the other hand, is about how reproducible or consistent repeated measurements are, not how close they are to the true value. Length and chemical change describe unrelated concepts.