What is fundamental and derived unit? what's the difference between them ?
give some examples of derived and fundamental units

A base unit or fundamental unit is a unit adopted for measurement of a base quantity.

and derived unit are those that are derived by the use of fundamental unit !

main difference is
There are seven fundamental quantities and they cannot be further broken down but the derived units can be many and they can be broken down to fundamental ones !

examplesmeter,gram,candela,ampere, etc are fundamentaland derived are area,volume,speed etc

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling