Review

Charge
Electron
Proton
Neutron
Quark
Coulomb's law (inverse square)

Current
Voltage
Resistance
Ohm's law (V = I R)

Circuits
Series
Parallel
Brightness problems (based on current, if bulbs are identical)

Schematic symbols
Light bulbs lighting
Batteries

Magnetism
Electromagnetism
Electromagnetic induction

Motors vs. engines
Basics of 2-stroke engines

Einstein 
Special relativity (time changing between observers)
General relativity (gravity caused by distortions of space caused by mass)