The%20Metric%20System

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The Metric System
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U.S.Metric Association

• Formed in 1916 to work to get the United States
  to go metric

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Why go Metric?
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What is a bushel?
http//www.unc.edu/rowlett/units/scales/bushels.h
tml
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Hand

• a traditional unit of distance, now used mostly
  to measure the height of horses. One hand equals
  4 inches, 1/3 foot, or 10.16 centimeters.

• Height 162 Hands

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Metric Standards

• Physical standards for units of measurement exist
  throughout the world.
• Locked away in special climate controlled,
  heavily guarded vaults, they represent a
  world-wide reference for our measurement system.
• Why is it important to have reference standards?

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• This kilogram/liter, made in 1905, was a hollow
  gold-plated brass sphere having a mass of
  approximately 1 kg and a volume of approximately
  1 cubic decimeter (1 liter).

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• Metric Measurements in Biology will use
• Length
• meter
• Mass
• gram
• Volume
• liter
• Temperature
• Celcius

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Temperature

• Celcius
• Water freezes at
• 0 celcius
• Water boils at
• 100 celcius

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Prefixes

• Kilo 1000 103
• Hecta 100 102
• Deka 10 101
• Base unit 1 100
• Deci 0.1 10-1
• Centi 0.01 10-2
• Milli 0.001 10-3
• Micro 0.000001 10-6

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Metric Mania Ladder

• http//sciencespot.net/Media/metric_metconv.ppt