Physical quantities and SI units

What is physical quantity
A physical quantity is a quantity that can be measured. It must consist of
1)numerical manitude
2) a unit

What is SI units

The International System of Units (SI) specifies a set of seven base units from which all other units of measurement are formed. These units are called SI derived units and are also considered part of the standard.

What are the 7 basic physical quantities/base quanitites
7 basic quanitities are measured in term of SI units. They are
1)Length (metre)
2)Mass (Kg)
3)Time (s)
4)Electric current (A)
5)thermodynamic temperature (kelvin)
6)Luminous intensity (candela)
7)Amount of substance (mole)

Example: Amount of substance (Mole)

The name "mole" was coined in German (as Mol) by Wilhelm Ostwald in 1893,[2] although the related concept of equivalent mass had been in use at least a century earlier. The name is assumed to be derived from the word Molekül (molecule).

-The mole is defined as the amount of substance of a system that contains as many "elementary entities" (e.g. atoms, molecules, ions, electrons) as there are atoms in 12 g of carbon-12 (12C)

-A mole has 6.0221415×1023[6] atoms or molecules of the pure substance being measured. A mole will possess mass exactly equal to the substance's molecular/atomic weight in grams.

-Because of this, one can measure the number of moles in a pure substance by weighing it and comparing the result to its molecular/atomic weight.

What is deprived quantity
Deprived quantity are deprived from these seven quanitities. For example area= length x length , distance travelled= time x length