Accuracy and Precision in Science

Accuracy and Precision in Science

Read each question carefully and answer to the best of your ability. Apply your understanding of accuracy and precision in scientific measurements.

In science, the terms 'accuracy' and 'precision' are often used interchangeably, but they have distinct meanings. Understanding the difference is crucial for conducting experiments and interpreting data correctly. Accuracy refers to how close a measurement is to the true or accepted value, while precision refers to how close repeated measurements are to each other.

1. A student measures the mass of a 100g standard weight five times and gets the following results: 99.8g, 100.1g, 99.9g, 100.0g, 100.2g. Are these measurements accurate or precise?

2. Which of the following scenarios best describes low accuracy and high precision?

3.   refers to how close a measurement is to the true or accepted value.

4.   refers to how close repeated measurements are to each other.

5. A measuring tool that consistently gives slightly higher readings than the actual value is considered to be   but could still be   if the readings are close to each other.

6. Imagine you are performing an experiment to measure the boiling point of water. The accepted boiling point is 100°C. You take three measurements: 99.5°C, 99.6°C, and 99.4°C. Discuss whether your measurements are accurate, precise, or both, providing reasons for your answer.

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

8. If a measuring instrument has a high degree of precision, it will always give accurate results.

9. Analyze the dartboard below. Describe the accuracy and precision of the darts thrown if:

a) All darts hit the outer ring on the left side, clustered together.

b) Darts are scattered all over the board, but one dart hit the bullseye.