How is accuracy defined in scientific measurements?

Accuracy in scientific measurements is defined as how close the measured values are to the true value or the accepted standard. This concept is fundamental in scientific practices because it reflects the reliability and credibility of the results. When measurements are accurate, it indicates that the data obtained closely matches the actual or expected results.

This is crucial in experiments and research where precise values can significantly influence outcomes and interpretations. For instance, in experiments where quantitative data is essential, such as measuring the concentration of a solution, achieving accuracy ensures that the conclusions drawn are valid and can be generalized or applied appropriately.

In contrast, the other options highlight different aspects related to measurement. Alignment with expected outcomes, consistency in repeated results, and ease of obtaining results are important but do not specifically address the closeness to the true value, which is the essence of accuracy.