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The Metric System. SI Units. Metric System Est. 1797. World-Wide Adoption. -. =. Why switch?. 1 pound = 16 ounces. Why switch?. 1760 yards = 1 mile. 12 inches = 1 foot. 3 ft = 1 yard. Why switch?. 1 kilometer = 1000 meters. 1 meter = 1000 millimeters. 1 kilogram = 1000 grams.
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The Metric System SI Units
Why switch? 1 pound = 16 ounces
Why switch? 1760 yards = 1 mile 12 inches = 1 foot 3 ft = 1 yard
Why switch? 1 kilometer = 1000 meters 1 meter = 1000 millimeters 1 kilogram = 1000 grams 1 gram = 1000 milligrams 1 kilosecond = 1000 seconds 1 second = 1000 milliseconds
Base units mass (kilograms) time (seconds) length (meters) electric current (amperes) temperature (Kelvins)
Derived units x = x x = = x x
SI Unit Names How much What it measures [prefix] [base] 1/100 centi- gram mass 1/1000 milli- second time 1000 kilo- meter length
SI Units & Scientific Notation 3,140,000,000,000 meters 3.14 × 1012 meters 3.14 Tm
SI Units & Scientific Notation 0.00000000812 seconds 8.12 × 10-9 seconds 8.12 ns
Converting from SI to SN Convert 20 mm to m: • = 20 x 10-3m Convert 400s to ns: • = 400 x 109ns
Guided Practice • Convert the following: • 33 km to m • 42.5 Dg to g • 38,000,000,000 s to Gs • 9.8 x 103mm to m • 303.9 cK to K
Quiz Tomorrow • Be able to write the entire SI Unit Conversion Chart from memory (available on Moodle) • Be able to convert to and from Base SI Units • Be able to convert from Scientific Notation to SI Units • Be able to add, subtract, multiply, and divide in Scientific Notation • (Get with a partner and start studying the SI Unit Conversion Chart)