Copper Sphere

This sphere is made of copper. Copper can be found in the environment in its native state although it is more often smelted, and was used by some of the oldest civilisations on earth. It is a relatively soft metal, which exhibits very high thermal conductivity and ductility. The combination of workability and good heat transfer made copper a very popular material for the production of cookware. In particular it is claimed that copper pans are better for beating egg whites as their reaction with the copper stabilises the foam.