Practice Criterion D: Evaluation (critiquing The Experiment) (11.4.3) - Chapter 11: Measurement and Data Processing

Practice: Criterion D: Evaluation (Critiquing the Experiment)

Lesson 11.4.3Measurement and Data Processing

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9 questions

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2 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is uncertainty?
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Think of how precise your measurements can be.
Question 2.
Define random error.
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Consider examples where you notice fluctuations.
3Question 3.
What is uncertainty in measurements?
- A fixed value
- The range of expected true value
- An exact number
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Think about how reliable our measurements can be.
4Question 4.
True or False: Systematic errors vary unpredictably.
- True
- False
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Consider how each type of error manifests.
Question 5.
An experiment yields a measurement believed to be 20 g, but the balance was uncalibrated, causing a systematic error resulting in an actual weight of 19.5 g. Calculate the percentage error between the expected and actual weight.
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Compare the values and remember to use the absolute value.
Question 6.
You conducted an experiment with a concentration result of 0.50 mol/L and a percentage uncertainty of 10%. Another lab has a known value of 0.45 mol/L. Is your measurement reliable, or does it suggest a systematic error?
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Remember to compare the percentage uncertainty with the calculated percentage error.

5 more questions in this section. Enroll free to practise them all.