SI System and Metrics

What is a standard? Standard - An exact quantity used for comparison If everyone uses the same standard, data can be understood worldwide

SI System Standard of measurement used worldwide Based on multiples of 10 Each measurement has a base unit Prefixes can be added to increase or decrease by multiples of 10

SI Base Units Quantity Unit Symbol *Length meter m *Mass kilogram kg *Temperature kelvin K *Time second s Amount of Substance mole mol Electric Current ampere A Light Intensity candela cd

Kilo- k Hecto- h Deka- meter liter D or da gram m L g deci- d centi- These are the base units, to which you can add a prefix c milli- m

What do each of these symbols mean? mm kg K mL Dg dL cm cL L kL hg daL g mg km hL

Using the Stairstep As you go UP the stairs, move the decimal point LEFT As you go DOWN the stairs, move the decimal point RIGHT

ALWAYS remember to include a unit with your answer! Convert the following 1000 km = m 356 mL = L 50 cm = hm 50000 m = km 442 daL = dL 6. How many mm are in 1 m? 7. 3 g = __________ Mg 8. How many bytes are in a Gigabyte? 1000000. .356 .0050 50.000 44200. 1000 mm .000000003 ALWAYS remember to include a unit with your answer! 1,000,000,000 bytes