Instrument Precision in Science
Grade 9 Science worksheet focusing on understanding and applying concepts of instrument precision, accuracy, and significant figures in measurements.
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Instrument Precision in Science
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Read each question carefully and answer to the best of your ability. Pay close attention to the concepts of precision, accuracy, and significant figures when answering measurement-related questions.
1. Which of the following best describes instrument precision?
How close a measurement is to the true value.
The consistency of repeated measurements.
The smallest unit an instrument can measure.
The range of possible errors in a measurement.
2. A student measures the length of a desk three times and gets 1.50 m, 1.51 m, and 1.49 m. The actual length of the desk is 1.80 m. How would you describe these measurements?
Accurate and precise
Accurate but not precise
Precise but not accurate
Neither accurate nor precise
3. The number of significant figures in a measurement indicates its .
4. A measurement of 20.0 cm has significant figures.
5. When adding or subtracting measurements, the result should be rounded to the same number of decimal places as the measurement with the number of decimal places.
6. Explain the difference between accuracy and precision in scientific measurements.
7. A digital thermometer reads 25.4°C. What is the implied precision of this instrument?
8. All zeros in a number are considered significant figures.
True
False
9. Observe the image below showing various measuring instruments. Based on their appearance, which instrument do you think would provide the most precise measurement for length? Justify your answer.
