# The Metric System - Download as PowerPoint by K2Tytb9

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```									The Metric System
• Worldwide, universal system of
measurement
• Based on tens, so easy to convert units
• The units of length, volume, and mass are
related by properties of water
History
• Treaty of the Meter (1875)
• Metric Conversion Act (1975) by President
Ford
• Omnibus Trade and Competitiveness Act
(1988)
• Today
Basic Units
•   Length – meter (m)
•   Volume – liter (L or l)
•   Mass – gram (g)

Definitions
• Length = how long something is
• Volume = the amount of space something
occupies
• Mass = the quantity of matter that something
contains
Other Metric Units
• Time – second
• Temperature – Celsius (° C)
0° C = water freezes
100 ° C = water boils
20 ° C = room temperature
37 ° C = body temperature
Prefixes
prefix         symbol     meaning         meaning

mega             M         million    1,000,000
kilo            k        thousand    1,000
hecto            h        hundred     100
deca             da          ten      10

Base unit (no prefix) = m, l, g
deci            d          tenth     0.1
centi            c        hundredth   0.01
milli            m       thousandth   0.001
micro                    millionth   0.000001
The substance that interrelates
the metric units is:
• Water

=              =                 =
Holds
A line that   Made into a   exactly 1
cube (solid                     And has
is 1 cm                     ml of water
volume)…                        a mass
(length)…
(liquid           of 1 g
volume)…          (mass)
Practice Questions
1.   How would you abbreviate a kiloliter?
2.   What does cg mean?
3.   What is a millionth of a meter?
4.   How many liters are in a megaliter?

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