Force and Motion, Simple Machines, Energy, & Electricity:Force and Motion: force, motion, speed, acceleration, velocity, inertia, gravity, frictionSimple Machines: simple machine, compound machine, inclined plane, wedge, screw, lever, wheel and axle, pulleyForms of Energy: energy, mechanical energy, chemical energy, electrical energy, thermal energy, light energy, sound energy, energy transformationElectricity: current electricity, static electricity, electrical charge, electron, circuit, sw