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1. Define measurement.
 
Measurement is the  the given physical quantity with  the of the same nature.
  
2. Define standard unit.
 
a. The standard term used for  is called unit.
 
b. Unit is the quantity of a  which is used to measure the magnitudes of other quantities of the .
  
3. What is the full form of SI system?
 
The SI unit system is also known as the,