Convection currents certainly has a possibility of coming up, in my opinion. Furthermore, I think static electricity and resistance questions come up in majority of questions, as well as energy transfers (specifically between kinetic energy/gpe). I don't think predictions are the best to go by, so just keep revising the spec until tomorrow comes. There is bound to be something on changing state too (potentially a graph) and maybe even a specific heat capacity practical. Maybe (?) a graph representing diodes or something, since I haven't seen that come up in my prior mocks. Good luck!