| A | B |
|---|
| simple machine | a machine with few parts |
| gear | a wheel with teeth |
| inclined plane | a flat, slanted surface |
| compound machine | a machine made up of two or more simple machines |
| wheel and axle | one part is shaped like a circle, and the other part is a rod that passes through the center |
| wedge | two inclined planes back to back |
| screw | an inclined plane twisted into a spiral |
| lever | a bar that can turn or pivot on a fixed point called the fulcrum |
| energy | the ability to do work or to cause changes in matter |
| force | a push or a pull |
| load | the object being lifted or moved by a simple machine |
| effort force | the force put into a simple machine |
| work | to apply a force that makes an object move |
| pulley | A form of a wheel and axle used in combination with a rope or chain |
