Things I have learned while being a TA #1:

[twobirds]

Copper is a superconductor.

Aluminum is a semiconductor.

The reason why magnesium oxide has low heat conductivity is because it is known as a low heat conduction material, therefore it will have low heat conductivity.

Comments

[eeyorerin]

I am enlightened! :)

[randomdreams]

erm... What sort of grades are these kids getting?