Measuring Length

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Measuring Length
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• We can measure length in feet, inches, yards,
  meters, or miles.
• Scientists use the METER.
• It is the standard unit of length used by
  scientists around the world.
• Its part of a system called the International
  System of Units, abbreviated SI.
• Units in the SI system are based on the number
  10. The basic SI unit for length is the meter.

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Metric System Prefixes

• King Kilo (1000)
• Henry Hecto (100)
• Died Deca (10)
• Unexpectedly Unit
• Drinking Deci (1/10)
• Chocolate Centi (1/100)
• Milk Milli (1/1000)

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Meters

•  There are
•  
• 10 decimeters in 1 meter.
•  
• 100 centimeters in 1 meter.
•  
• 1000 millimeters in one meter.
•  
• 1000 meters in a kilometer.

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Measuring Length

• First, choose the most reasonable unit.
• Examples
• To measure the length of an ant, the most
  reasonable choice would be the millimeter.
• To measure the distance between Brandon and
  Pearl, use kilometers.
•  

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Which unit would be most reasonable to measure
the following?

• millimeters (mm) centimeters (cm)
• meters (m) kilometers (km)
•  
• The distance from Mrs. Coxs room to Mrs.
  Blakeneys room
• The width of this letter E
• The distance a snail crawls in one minute
• Your height
• The distance from Brandon Middle School to
  Wal-Mart

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km
m
cm
mm
The basic unit of length in the SI system in the
meter and is represented by a lowercase
m. Standard The distance traveled by light in
absolute vacuum in 1/299,792,458 of a second.
Metric Units 1 Kilometer (km) 1000 meters 1
Meter 100 Centimeters (cm) 1 Meter 1000
Millimeters (mm)
Which is larger?
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Measuring Length
How many millimeters are in 1 centimeter?
Ruler http//www.k12math.com/math-concepts/measur
ement/ruler-cm.jpg