Are you in agreement with the statement: "The fundamental unit of length is the kilometer and the fundamental unit of mass is the gram"?

Write the unit and dimension of the Boltzmann constant.

It is estimated that per minute each $cm^2$ of the Earth receives about $2 \ cal$ $(1 \ cal = 4.18 \ J)$ of heat energy from the Sun. This is called the Solar constant. In $SI$ units,the value is: (in $W/m^2$)

The unit of energy in the $SI$ system is:

Explain supplementary quantities and their units in the $SI$ system.

What is the $SI$ unit of density?