Question

Define the following terms and state their SI units.

1. Area - 
2. Mass - 
3. Density

Answer 1

1. Area -
   This is the measure of extend of surface SI unit cm², m²
2. Mass - 
   It is the measure of quantity of matter contained in a substance SI kg, g
3. Density - 
   This is the mass per unit volume of a substance SI kg/m³.