Metric System

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System International
The International System of Measurement Also
known as The Metric System
by Angie Shoemate
SI
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Metric System

• simple to use
• based on units of ten
• easy to make conversions
• used by all scientists
• used in the medical field
• used in most countries
• can be easily learned in an hour

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Directions

• Obtain a yellow sheet and a ruler.
• Write your name in the upper left corner.
• Locate the column of prefixes.
• Draw a line above kilo- all the way across the
  paper - edge to edge.
• Draw another line below milli- all the way across
  the paper - edge to edge.

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Check Does your paper look like this?
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You must memorize the prefixes between the lines
drawn.
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Lets say them together..

• kilo-
• hecto-
• deka-
• (unit of measure or meter-liter-gram)
• deci-
• centi-
• milli-

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Units of measure
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Metric notes.

• At the bottom of your paper make note of this
• meter- measures units of distance or length
• liter - measures units of volume or liquids
• gram - measures units of mass or weight

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More notes.

• On the back of your paper, take these notes
• There are no commas in the metric system.
• There are no fractions in the metric system.
• When the liter symbol is hand written, it must be
  a capitol letter so that is not confused with a
  one. When it is with another symbol, lower case
  can be used. Ex L stands for liter, and ml or
  mL both mean milliliter.
• Metric temperature is Kelvin. Celsius is a more
  common form of SI temperature, because it is
  derived directly from the Kelvin scale. On the
  Celsius scale, water freezes at 0 oC and boils at
  100o C.

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Make a scale for conversions

• Make a row of seven boxes across your paper like
  this
• Use prefixes to fill in each box left to right
  from greatest to smallest. Start with kilo- on
  the left and end with milli- on the right.
• Make sure they are in order and unit is in the
  center box.

             
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Your scale should look like this
kilo- hecto- deka- (unit) deci- centi- milli-

• Some like to make a triple scale using only
  symbols like this

km hm dam m dm cm mm
kl hl dal L dl cl ml
kg hg dag g dg cg mg
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Converting in Metrics

• Identify the position of the decimal. If there
  is no decimal, it is at the end of the number.
  Put your pencil there.
• Identify the location of prefix (or lack of,
  meaning the unit of meter, liter or gram) on the
  metric scale. Put your index finger there.
• Identify the new position (where the new prefix
  is located).
• Determine whether you need to move right or left
  .
• Determine how many times you need to move to get
  there.
• Move the decimal the same number times and in the
  same direction.

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Lets practice

• Take out a piece of scratch paper and write this
  problem down.
• 3.4m ______ cm
• Put your pencil on the decimal (.)
• Put your finger on (units) where m would be.
• Move your finger right 2 times to cm.
• Move the decimal right 2 times.

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Did you get this answer

• 3.4m 340cm
• Great!
• Lets try another.
• 500mg _____ g
• Use the same procedure. Put your pencil on the
  decimal and your finger on the corresponding
  space and move.

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ReadySetMove

• 500mg _____ g
• Put your pencil where the decimal should be and
  your finger on the mg box.
• Move your finger 3 times left then move the
  decimal 3 times left.
• Did you get
• 500mg .5g
• Good job!

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One more time

• .2kL _____ L
• Pencil on the decimal and finger on the chart.
• Count 3 right then move the decimal 3 right.
• Did you get
• .2kL 200L
• Yea!

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That was easy

• Practice just a few then check your answers with
  a friend.
• 3.5cm____mm
• 500mg____g
• 2L____mL
• .25km____m

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Check your answers

• Did you get.
• 3.5cm35mm
• 500mg.5g
• 2L2000mL
• .25km250m
• Now all you have to do is practice, practice,
  practice..

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A few more notes

• Metric units of volume can be converted to cubic
  centimeters, cc, or centimeters cubed, cm3, very
  easily.
• Step one convert to millileters (mL).
• Step twomilliliters are equal to cubic
  centimeters and to centimeters cubed.
• SomL cc cm3

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Lets practice these

• 23mL _____cc
• Did you get
• 23mL 23cc
• How easy!!!
• 55cc _____cm3
• Did you get
• 55cc 55cm3
• Youre great!

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Just one tough one

• .7L _____cc
• First convert to mL
• .7L _____mL
• You get 700mL
• Then 700mL 700cc
• Now that wasnt so tough was it?

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Now you know the International System of
Measurement!aka SIIsnt the metric system
easier than you thought?

• Keep practicing!!!

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Congratulations! Congratulations!

• Congratulations!