In this interactive, drag a pendulum to set its initial height and observe how height is related to potential energy. Then release the pendulum and observe the change from potential energy to kinetic energy, and ultimately to thermal...

A page from the question and answer section of this useful site. The page responds to the user question: "Explain convection to me in terms I can understand." An excellent discussion of the method of convection.

Lists thermal conductivity values for a variety of topics. The link "Heat conduction discussion" on this page displays an equation for calculating the rate of thermal conduction using these conductivity values.

What is heat? Illustrated discussion of how heat is transferred and its effect on the states of matter.