I. Units of Measurement Number vs. Quantity SI Base Units & Prefixes

A. Number vs. Quantity Quantity - number + unit UNITS MATTER!!

B. SI Units Quantity Base Unit Symbol Length Mass Time Temp meter kilogram second kelvin m kg s K Current ampere A

B. SI Units Quantity Base Unit Symbol Velocity Force Energy m/s m/s2 N Acceleration Force Energy Meter/second Meter/second2 Newton Joule m/s m/s2 N J Power Watts W

“King Henry Died By Drinking Chocolate Milk!” SI Prefixes Prefix kilo hecto deka base deci centi milli Symbol k H D bu d c m “King Henry Died By Drinking Chocolate Milk!”