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 • THE METRIC SYSTEM
 • INSTANT METRIC
 • METRIC AMERICA
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Test Your Metric Learning Skills
METRIC EXAM!
Assignments

 • 7 BASE SI UNITS
     Spoken SI... "ess i"
  
The International System

Test Your Metric Learning Skills
METRIC EXAM!
Assignments

 • EVERYDAY METRIC UNITS
 • PREFIXES
 • SYMBOLS
 • Base Unit - meter  (m)
                   • centimeter  (cm)
                   • millimeter  (mm)
                   • kilometer  (km)
 • Derived Unit - liter  (L)
                   • milliliter  (mL)
 • Base Unit - kilogram  (kg)
                  • gram  (g)
                  • milligram  (mg)
                  • tonne  (t)
 • Temperature
 • Evolution of Measures
 • Inch-Pound Non-System

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    • UNITED METRIC STATES

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VIDEO CLIP
DID YOU KNOW?
that you can divide 1 meter
by exactly 10 equal parts
(10 cm x 10 cm x 10 cm)

then make a cube (1000 cmณ)
of it to fill with water
and you will find that it
contains exactly 1 L (1 liter)
(1000 mL
) of water
and is the mass of exactly
1 kg (1 kilogram) (1000 g).
ALL SIMPLY RELATED IN 10!


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The International System of Units is called "SI"
and is the Metric Measurement
used in America.

SYMBOLS
IDENTIFY Prefix
and
Base Unit or Derived Unit
or Unit of Measure
TOGETHER



The International Bureau of Weights and Measures SI Brochure notes:
"Unit symbols are mathematical entities and not abbreviations."
Among other things, they are not followed by a period except
at the end of a sentence and they are not made plural.

PREFIX SYMBOL
for EVERYDAY USE

centi  is 1 one hundredth (0.01)

milli is 1 one thousandth (0.001)

kilo is 1000 times
as much

BASE
and
Derived UNIT SYMBOL

meter  m

liter  L

kilogram  kg

 

Symbols
identify prefix and base or derived unit OR
everyday unit of measure together.
Simply place the prefix in front of the base or derived unit
like mm (millimeter),
cm (centimeter), km (kilometer) or mg (milligram),
kg (kilogram) and mL (milliliter). 
The size or quantity is indicated by the first letter or
prefix symbol and the second letter or symbol
identifies the base or derived unit.

   We easily identify the prefix centi when we think of 100 cents in the Unit  dollar. We could even refer to it as a "centidollar" and you come pretty close to doing that anyway by calling it 1 cent. There are exactly 100 cents in a dollar just like 100 cm (centimeters) in a meter.
Got it? It just gets easier.

    Please Note:
Where
symbols are used convention has it that they are always lower case letters except where the Base Unit is named after a person like Celsius (ฐC), Pascal (P) or Newton (N) and 16 other scientists.
 Then the symbol is noted by a CAPITAL LETTER.
So what's with a capital letter "L" for liter?
    Is that a capital "L" for the unit of measure
named after a person? 
No....
    You see, when decimal dimensions were described long before
the typewriter you would have to write the script.
    But as technology came along it became apparent that typewriters were not equipped with the script so attempts were made
to use the lower case "l" (el).
   Then it became further confusing to write "1l" (lower case "el") as the "1" and "l" (el) looked too similar as did the capital "I" (eye).
   So the capital "
L" was chosen as the symbol for
the derived base unit "liter".


Use prefixes in front of the base or derived unit or unit of measure OR everyday unit of measure to make the Quantity, Size or Value smaller by
1 one hundredth (0.01)
even smaller by
1 one thousandth (0.001) OR
bigger by 1000 times as much

CLICK ON PICTURES
FOR VIDEOS!

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UNDERSTAND
EVERYDAY
RELATIONSHIP BETWEEN
Length Volume
and
Mass
in terms of meter, liter and kilogram


CLICK ON PICTURES BELOW FOR VIDEO CLIPS

SMALLER METRIC
MEASURES
1 cmณ (1 cubic centimeter)

filled with water contains exactly
1 mL (1 milliliter)

and is the mass  of exactly
1 g (1 gram)

VIDEO CLIP
"centimeters milliliters milligrams"
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