Table of contents 
Property of Matter 
Units for Measurement 
Fundamental Units 
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All physical quantities have to be measured. The value of a physical quantity is expressed as the product of the numerical value and the unit in which it is expressed.
Fundamental units are those units which can neither be derived from one another nor they can be further resolved into any other units.
The International System of Units (in French Le Systeme International d’Unites– abbreviated as SI) was established by the 11th General Conference on Weights and Measures (CGPM from Conference Generale des Poids at Measures).
The SI system has seven base units.
Seven Basic S.I. Units
The Seven Fundamental Units of measurement in S.I. system.
Definitions of S.I. Base Units
Derived units: Some quantities are expressed as a function of more than one fundamental unit known as derived units.
Example: velocity, acceleration, work, energy, area, density, etc.
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