2 SI Units Why use them? Common system Easy to use -based on factors of 10
3 SI Base Units What are they? Second (s) Time Meter (m) Length/distance Kilogram (kg)Kelvin (K)Ampere (A)What are they?TimeLength/distanceMassTemperatureElectric currentDerived Units: Volume 1 cm3 = 1 mL
4 SI Conversion milli- m 10-3 centi- c 10-2 kilo- k 103 mega- M 106 giga- G 109Examples
5 Scientific Notation Why use it? Format Easier to write really small or large numbersFormat? x 10n? = number between 1 and 10n = positive exponent (for large numbers)n = negative exponent (for small numbers)
6 Scientific Notation Examples Earth’s Radius Lifetime of pion Earth to the MoonDiameter of an atom
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