This document discusses transient heat conduction and temperature distributions using one-term approximations in plane walls, cylinders, and spheres. It also covers Heisler-Grober charts, which provide simplified graphical solutions for transient conduction problems involving these basic geometries. The temperature distribution at any position within the walls or bodies can be estimated, as well as specifically at the center, using the one-term approximation and Heisler-Grober charts aid in graphical solutions.