| A | B |
|---|
| machine | a device that makes work easier by reducing the amount of force needed to do a job |
| inclined plane | a simple machine with a sloping surface |
| wedge | two inclined planes placed back to back; used to separate materials by pushing them apart |
| screw | an inclined plane in spiral form |
| lever | a simple machine made up of a bar that turns or pivots around a fixed point |
| pulley | a simple machine made up of a wheel around which a rope or chain is passed |
| wheel and axle | a simple machine made up of two wheels of different sizes that pivot around the same point |
| fulcrum | the fixed point around which a lever pivots |
| compound machine | a machine made up of two or more simple machines |
