The three plots to the right show the conductivity as a function of temperature for thre...

The three plots to the right show the conductivity as a function of temperature for three different types of materials: a semiconductor with a small band gap, a metallic conductor, and a superconductor. Which plot corresponds to which material? (Hint: Remember in a semi. conductor thermal energy is needed to excite elections from the valence band to the conduction band.) [Sections 12.1, 12.3, and 12.5]