Phisic

Quantity and Unit
Quantity is Something that can be measure and has unit.
Unit is Anything serves to compere in a quantity.
Quantity is differented into two, Basic Quantity and Derivative Quantity.
Basic Quantity is the base to make other quantities.

                                Basiq Quantities and their Unit in SI


Basic Quantities                 Unit names in SI                          Unit Symbol
Length                                           Metre                                         m
Mass                                             Kilogram                                    kg
Time                                                Secon                                       s
Electric Current                             Ampere                                        A
Amount of Subtance                      Mole                                          mol
Temperature                                 Kelvin                                           K
Lumonius Intensity                        Candela                                        Cd

Beside seven quantities,there are also other quantities decided in conference.
Unit for Flat Angle is Radian (rad). 
Unit for Room Angle is Steradian  (Sr).