7 Measurement SystemsInternational System of Units (SI): an improved version of the metric system.Understood by scientists worldwideBased on multiples of 10 and uses prefixes to indicate a specific multiple.
8 Measurement Systems SI Base Units: Length – meters (m) Mass – grams (g)Liquid volume – liters (L)Time – seconds (s)
9 See the “Metric Toolbox” or Page 15 of your textbook for more Measurement SystemsSI Prefixes:Kilo (k) – x1000Centi (c) – x 0.01 or 1/100Milli (m) – x or 1/1000See the “Metric Toolbox” or Page 15 of your textbook for more
10 Measurement Systems Converting between SI Units: Use conversion factors:ratios that are used to change one unit to another
11 ExampleThere are 1000 mL in 1 L.How many mL are in 3 L?
12 Factor Label Method Write what you know on the left Write what you want on the rightPut a conversion factor in the middleCancel units on top and bottomMultiply top and divide bottom
13 ExampleThere are 100 cm in 1 m.How many cm are in 2.75 m?