| A | B |
|---|
| lever | Board resting on turning point |
| pulley | wheel with a rope |
| screw | used to fasten things together |
| wedge | used to cut or push objects apart |
| wheel and axle | wheel with a rod used to move things |
| incline plane | slanted surface used to get from one level to another |
| gears | wheels with jagged edges |
| simple machine | tools that make work easier |
| force | pushing or pulling |
| gravity | force that pulls things to the earth |
| work | using force to move an object |
| energy | needed to do work |
