what is the difference between a sphere and a spherical shell - Maths - Surface Areas and Volumes

Question

what is the difference between a sphere and a spherical
shell????

Anuradha Sharma · Accepted Answer

A spherical shell is a region between two concentric spheres of
differing radius whereas a sphere is a round solid figure, or
its surface, with every point on its surface equidistant from its
centre

what is the difference between a sphere and a spherical shell????