| A | B |
|---|
| Lever | a stiff bar that rests on a support |
| Inclined plane | a slanting surface connecting one level to a higher |
| Wheel and Axle | a wheel with a rod going thruogh the middle both parts move together |
| Pulley | a grooved wheel with a rope or cable around it |
| Screw | an inclined plane wrapped around a rod |
| Wedge | an object with at least one slanting side ending in a sharp edge |
| Complex Machine | one or more simple machine combined in one |
| Simple machine | a machine that makes work easier and does work in one movement |
