Grade 12 Applied Science Problems
A worksheet for Grade 12 science students focusing on applied problems in units and measurement, including conversions, significant figures, and experimental data analysis.
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Grade 12 Applied Science Problems
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Read each question carefully and provide detailed answers. Show all your work, including units and significant figures, where appropriate.
1. A chemist measures the mass of a substance as 0.00345 kg. Express this mass in grams with the correct number of significant figures.
2. The speed of light in a vacuum is approximately 3.00 x 10^8 m/s. Convert this speed to km/h, ensuring your answer has the correct number of significant figures.
3. Which of the following is an example of a systematic error in an experiment?
Random fluctuations in temperature
Misreading a scale on a measuring instrument
A consistently uncalibrated balance
Human reaction time during timing measurements
4. Precision in measurement refers to:
How close a measurement is to the true value
The reproducibility of measurements
The number of significant figures in a measurement
The smallest unit of measurement used
5. The diameter of a human hair is approximately 0.00008 meters. In scientific notation, this is meters.
6. A typical computer hard drive has a capacity of 1 terabyte (TB). This is equivalent to bytes.
7. A student conducts an experiment to determine the density of an unknown liquid. They measure the mass of the liquid as 25.6 g and its volume as 30.5 mL. Calculate the density of the liquid in g/mL. Round your answer to the correct number of significant figures.
8. All non-zero digits in a measurement are considered significant.
True
False
9. Random errors can be eliminated by repeating an experiment multiple times and averaging the results.
True
False
10. You are designing an experiment to measure the acceleration due to gravity using a pendulum. What factors might introduce errors into your measurements, and how would you minimize them?