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SI System and MeasurementObservations: Qaulitiative vs. QuantitativeSI System: what is it?Advantages:Base units (define):Examples:Derived Units (define):ExamplesMetric PrefixesHow to read this chart: EXAMPLE: 1 milligram (mg) = 10-3 g = .001 g = 1 thousandth of a gramMetric ConversionsProcedure for metric conversions with conversion factors:Example: convert 27 km to mSTEP 1: Write the given measurement from the problemExample: 27 kmSTEP 2: Set up the units of the conversion factor. The units to cancel belong in the denominator, the unit to convert to belongs in the numerator.Example: 27 km * ( m) =1504950825400 ( km)STEP 3: Write in the numbers of the conversion factor.STEP 3A: Write a 1 on the side of the fraction with a prefix2419350336550103 goes here because k = 103020000103 goes here because k = 103STEP 3B: From memory or from our chart, write the factor of 10 for the prefix on the side of the fraction without a prefix.17811756858000Example: 27 km * ( 103 m) =232410015875The 1 goes here, because that’s where the prefix “k” is.020000The 1 goes here, because that’s where the prefix “k” is.1504950634900 ( 1 km)17240251397000STEP 4: Multiply and simplifyExample: 27 km * ( 103 m) = 27 x 103 m = 2.7 x 104 m15049501142900 ( 1 km)Name: ________________________________________ Section: _____Date: ____________________Metric Conversion PracticeExample 15 s is how many ms?Example: 2 feet is how many inches?Convert:1. 13 km to m:2. 130 cm to m:3. 18 mg to g4. 1.2 kj to j5. 9.2 kb to b**6. 1.2 km to cm**7. 8 kg to mg ................
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