Measurement of Weight Grade 4 | Learning Concepts | ORCHIDS
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Measuring Weight

To know how heavy or how light an object is, we need to measure the weight. We can tell the weight of something just by observation, but to know the exact weight, we need to measure it.

G4_1_M Weight_Heavy-Light
  • To measure weights more precisely, we use standard units.
  • Standard units are pre-defined and do not change person to person or object to object.
  • To measure weight in standard unit, we use different tools such as balance, digital balance, beam balance, etc.
  • Weights can be measured in different units. Some of the units are:
    • Kilogram (kg)
    • Gram (g)
    • Centigram (cg)
    • Milligram (mg)

Relation Between Different Units

  • One Kilogram is equal to 1000 Gram.
  • One Gram is equal to 100 Centigrams.
  • One Centigram is equal to 10 Milligrams.
G4_2_M Weight_Units

Conversion of Units

  • To convert kilogram to Gram, we multiply it by 1000. To convert Gram to Kilogram, we divide it by 1000.
  • To convert Gram to centigram, we multiply it by 100. To convert Centigram to Gram, we divide it by 100.
  • To convert Centigram to Milligram, we multiply it by 10. To convert Milligram to Centigram, we divide it by 10.
    G4_3_M Weight_Conversion

Selection of appropriate measurement units:

  • Weights of very light things should be measured in milligrams (mg).
  • Weights heavier than 10 mg but lighter than a gram should be measured in centigrams.
  • Weights heavier than one gram should be measured in grams.
  • Very heavy objects should be weighed in kilograms.
G4_4_M Weight_Common Mistakes

G4_5_M Weight_Did you know
G4_6_M Weight_Mind map
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