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Measurement

Measurement. Science 10 G.Burgess 2007. (SI, Système Internationelle d’ unit é s) The International System of Units. Developed in 1960, SI is a set of standard units agreed upon by the scientific community as units of measurement.

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Measurement

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  1. Measurement Science 10 G.Burgess 2007

  2. (SI, Système Internationelle d’ unités)The International System of Units • Developed in 1960, SI is a set of standard units agreed upon by the scientific community as units of measurement. • The units in the metric system, developed by France in the 1700’s • During this unit we will be using the m(metre=distance), s(second=time) and g(gram=mass)

  3. Metric Prefixes and Values

  4. Metric conversion • km  hm multiply km by 10 • km  dam multiply km by 100 • km  m multiply km by 1000 • mmcm divide mm by 10 • mmdm divide mm by 100 • mmm divide mm by 1000 • When going from large unit to smaller one divide the value by 1*10 for every step to the unit wanted. • When going from a smaller unit, divide the value by 1*10 for every step to the unit wanted.

  5. Examples of metric conversion

  6. Examples of metric conversion

  7. Measuring with significance • Measuring with significance (using significant figures) enables scientists to give precise measurements. • When we measure with significance we give a digit to the marked numbers on the measuring instrument and guess a single digit to represent where between the markings the measurement goes.

  8. Measuring instruments • Distance: ruler • Temperature: thermometer • Mass: scale

  9. Precision of measurement • IE. A ruler that measures mm is more precise than a ruler that measures in cm or m. • Precision, or READABILITY refers to the place value a measuring instrument goes to. • how many ‘decimal places’, an instrument can show.

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