What is a Quantity?
A concept that can quantitvely describe a physical phenomena
An example of a Basic Quantity
Mass
An example of a Derived Quantity
Speed
Mass units?
kg
Length units?
m
Time units?
s
Temperature units?
K
Electric current units?
A
Amount of substance units?
mol
Luminous intesity units?
cd
What are Dimensions?
The type of quantity in the question independent of its unit or values