posted by John .
What is heat energy? Where does it come from, and what are its properties? Include in your discussion the following terms: molecules, conduction, convection, and radiation.
Since this is not my area of expertise, I searched Google under the key words "heat energy" to get these possible sources:
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.