Grade 11 Science: Applied Problems in Measurement
This worksheet focuses on applied problems in units and measurement for Grade 11 science students, covering significant figures, unit conversions, and experimental error.
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Applied Problems in Measurement
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Read each question carefully and provide your answers in the space provided. Show all your work for calculations, including units and significant figures.
1. A student measures the length of a desk as 1.250 meters. How many significant figures are in this measurement? Explain your reasoning.
2. Express the speed of light, 299,792,458 m/s, in scientific notation with three significant figures.
3. Convert 55 miles per hour to meters per second. (1 mile = 1609 meters, 1 hour = 3600 seconds)
Answer: m/s
4. A chemical reaction produces 2.5 liters of gas. How many milliliters is this? mL
5. Which of the following best describes systematic error in an experiment?
Errors that occur randomly and unpredictably.
Errors that consistently shift measurements in one direction.
Errors caused by human mistakes during data recording.
Errors that can be eliminated by repeating the experiment.
6. A scientist measures the mass of a sample three times and obtains the following results: 10.2 g, 10.3 g, 10.2 g. The actual mass of the sample is 12.0 g. Discuss the precision and accuracy of these measurements.
7. Random errors can be reduced by taking more measurements and averaging the results.
True
False
8. A car travels a distance of 150 km in 2.0 hours. Calculate the average speed of the car in meters per second.