The first real podcast for unit 4. All about energy profiles and chemical energy. Feel free to join the Edmodo class group at edmodo.com. The group code is "v4buva" The notes can be found there and there is also a multi choice quiz. (only 10 questions but cover most of what is in this podcast).
Notes are also here: https://dl.dropbox.com/u/38018298/13_Energy%20profiles.pdf