This document discusses the 6 simple machines: wedge, inclined plane, screw, lever, pulley, and wheel and axle. It provides details on what each machine is made of and how it works. The key points are that simple machines make work easier by reducing the amount of force needed. A wedge splits objects apart using less force. An inclined plane reduces the amount of work needed to move an object up or down a slope. Screws hold objects together and can crush objects. Levers multiply force to make moving heavy loads easier. Pulleys allow objects to be moved vertically or horizontally with less effort. Wheel and axles help transport objects faster the more the axle is turned.