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Measurement

Measurement. The comparison of some aspect of an object or phenomenon with a standard unit. How do you properly measure something?. Use a measuring instrument to determine a number. The last digit of your number is always estimated.

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Measurement

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  1. Measurement The comparison of some aspect of an object or phenomenon with a standard unit.

  2. How do you properly measure something? • Use a measuring instrument to determine a number. • The last digit of your number is always estimated. • A proper significant figure included all digits as read from the instrument plus one doubtful digit.

  3. How do you properly measure something? • Every number is assigned a unit.

  4. International System of Units (SI Units) • Standard system of measurement used in science • Examples: • kilogram, centimeter, kilometer, liter, milligram, millimeter, milliliter, degrees Celsius

  5. Prefixes • Kilo – 1,000 • Centi – 1/100 • Milli – 1/1000

  6. Precision Vs Accuracy • Precision • How reproducible a measurement is.

  7. Precision vs. Accuracy • Accuracy • How correct a measurement is.

  8. Precision vs. Accuracy

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