Metrics

I.General Metric System Info A.Common system of measurement 1.Units are based on physical standard 2.Based on a scale of 10 Why?  Much easier to divide or multiply by powers of 10 B.Also called International System of Units (SI) 1.Almost all countries use it as their everyday means of measurement 2.United States tried converting in the early 1980’s but met resistance from the older generation

II.Common Metric Units A.Length = distance from one point to another 1.Base unit - meter (m) 2.Tools - ruler, meter stick, tape measure B.Mass = amount of matter in an object 1.Base unit - gram (g) 2.Tool - balance C.Temperature = measure of warmth or coldness 1.Base unit - degree Celsius ( o C) 2.Tool - thermometer D.Volume = amount of space something takes up 1.Base unit - liter (L) 2.Tool - graduated cylinder for liquid

Metric Units Movie

E.Common Metric Prefixes 1.nano - (n) 1/1,000,000,000 (one billionth) 2.micro ( μ ) - 1/1,000,000 (one millionth) 3.milli (m) - 1/1000 (one thousandth) 4.centi - (c) 1/100 (one hundredth) 5.kilo (k) - 1,000

A. Moving Decimal Method Moving Decimal Chart DRAW left - larger right - smaller III. Metric Conversions

Moving the Decimal Movie

B.Cancellation Method 1 m = 100 cm. Written as a fraction is: 100 cm1 m 1 mOR100 cm Problem: 2700 cm = ______ m ? 2,700 cm X 1 1 m 100 cm =2,700 m 100 = 27 m

Unit Cancellation Method Movie