What is the difference between a boiled egg and earth?

Both have a thin, brittle shell. The crust of the earth is broken into pieces, like the cracked shell of a hard boiled egg. The mantle of the earth is like the egg white, and the core of the earth lies in the center, like the egg yolk.

Compare the relative thickness of the shell of an egg to the lithospheric "shell" of the Earth

Measure the diameter of the egg, then measure the thickness of the egg shellRatio of egg shell to egg radius is about 2% Ration of lithosphere to Earth radius is about 2%