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Home Page Science Chemistry IB Chemistry Chapter 1.7 - The Reliability of a Measurement - Flashcards

Chapter 1.7 – The Reliability of a Measurement – Flashcards

Mike Bryan
7 July 2022
6 test answers

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question
what are significant figures?
answer

o   the non-place-holding digits

question
what are exact numbers?
answer

o   no uncertainty, no limit to the number of significant figures in any calculation

question
what is accuracy?
answer

o   how close the measured value is to the actual value

question
what is precision?
answer

o   how close a series of measurements are to one another or how reproducible they are

question
what is random error?
answer

o   equal probability of being too high or too low

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question
what is a systemmatic error
answer

– error that tends to be either too high or too low

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