Accuracy and Precision in Measurement

Accuracy and Precision in Measurement

Read each question carefully and provide thoughtful answers. Use the provided space for your responses.

In scientific measurements, 'accuracy' and 'precision' are two critical concepts that describe the quality of data. While often used interchangeably in everyday language, they have distinct meanings in a scientific context. Understanding the difference is fundamental to conducting reliable experiments and interpreting results.

1. Which term describes how close a measurement is to the true or accepted value?

2. A student repeatedly measures the mass of a known 10.0 g weight. Their measurements are 9.9 g, 10.1 g, 10.0 g, and 9.9 g. These measurements can be described as:

3. Random errors primarily affect the   of a measurement, while systematic errors primarily affect the   of a measurement.

4. A measuring instrument that consistently gives readings that are too high has a   error.

5. It is possible for a set of measurements to be precise but not accurate.

6. Improving the precision of a measurement automatically improves its accuracy.

7. A dart player consistently hits the same spot on a dartboard, but that spot is far from the bullseye. Describe the player's accuracy and precision.

8. Explain how a systematic error differs from a random error in an experiment.

9. Analyze the following target diagrams. For each diagram, determine if the shots are accurate, precise, both, or neither.

Diagram A:  

Explanation:  

Diagram B:  

Explanation: