Measurement

• Measurement


  How big or heavy something is when compared with a unit of standard size, width or weight
• Measurement is a comparison of a standard unit to an object
• We use numbers to describe simple things like height, weight, etc.
• Importance of measurement


  • Helps us quantify things
• Metric system


  A system of measurement developed in France in 1795
• Kam


  The Imperial System of Measurement
• This is an old British system of measurement
• Units in the Imperial System

  • Yard
  • Mile
  • Inches
  • Foot
  • Pounds
  • Ounce
  • Pint
  • Gallon
  • Hand span
  • Rope
• Countries that use the Imperial System

  • Liberia
  • United States of America
  • Myanmar
• Length


  The distance from one end to another of an object
• Standard unit of length

  Metre (m)
• Metric units of length

  • Kilometre (km)
  • Hectometre (hm)
  • Decametre (dam)
  • Decimetre (dm)
  • Centimetre (cm)
  • Millimetre (mm)
• Instruments used to measure length

  • Ruler
  • Tape measure
  • Caliper
  • Vernier caliper
• Mass


  The measure of the force of gravity of an object
• Base unit of mass

  Gram (g)
• Metric units of mass

  • Kilogram (kg)
  • Hectogram (hg)
  • Decagram (dag)
  • Decigram (dg)
• Instruments used to measure mass

  • Scale (Balance, Digital, Body)
• To convert from a large unit to a small unit, we multiply
• To convert from a small unit to a large unit, we divide
• 
  

  To convert from a small unit to a
• To convert from a small unit to a large unit

  Divide
• Convert 650 kg to gram

  • 650 kg = 650,000 g
• Convert 3.008t to Kilogram


  • 3.008t = 3,008 kg
• Convert 98cm to meter

  • 98cm = 0.98m
• Conversion factors


  • 1 Kilometer = 1000m
  • 1 meter = 100cm
  • 1 centimetre = 10mm
  • 1 tonne = 1000 kg