1. Metric System

2. Official Name: International System of Units (SI) Official Name: International System of Units (SI) was devised by French scientists in the late 18 th century. was devised by French scientists in the late 18 th century. goal -to produce a single unified system that could be used throughout the entire world. goal -to produce a single unified system that could be used throughout the entire world.

3. Metric System is based on a base unit that corresponds to a certain kind of measurement is based on a base unit that corresponds to a certain kind of measurement  Length = meterVolume = liter  Weight (Mass) = gram Prefixes plus base units make up the metric system Prefixes plus base units make up the metric system Example: Example:  Centi + meter = Centimeter  Kilo + liter = Kiloliter

4. Metric Prefixes Kilo (k)meaning 10 3 hecto(h)meaning 10 2 deka(da)meaning 10 1 BASE UNIT---meters, Liters, grams deci(d)meaning 10 -1 deci(d)meaning 10 -1 centi(c)meaning 10 -2 centi(c)meaning 10 -2 milli(m)meaning 10 -3 milli(m)meaning 10 -3 micro(u)meaning 10 -6 micro(u)meaning 10 -6 Move decimal RIGHT Move decimal Left

5. Converting with the Metric System King Henry Drinks Milk During Castle Meetings Kilo Hecto Deca Meter Deci Centi Milli 1000 100 10 1.1.01.001 1000 m = ______ km.001 hg = ______ dg 42.7 L = _____ cL

6. Metric System If you move to the left in the diagram, move the decimal to the left If you move to the left in the diagram, move the decimal to the left If you move to the right in the diagram, move the decimal to the right If you move to the right in the diagram, move the decimal to the right kilohectodecameterlitergramdecicentimilli

7. Metric System Summary Summary Base units in the metric system are meter, liter, gram Base units in the metric system are meter, liter, gram Metric system is based on powers of 10 Metric system is based on powers of 10 For conversions within the metric system, each “ step ” is 1 decimal place to the right or left For conversions within the metric system, each “ step ” is 1 decimal place to the right or left Using the diagram below, converting to the right, moves the decimal to the right and vice versa Using the diagram below, converting to the right, moves the decimal to the right and vice versa