| A | B |
|---|
| Machine | A device that changes the size or direction of a force used in doing work |
| Compound machine | Combination of two or moe simple machines |
| Lever | a machine that does work by turning around a fulcrum |
| Wheel and axle | simple machine made up of two circles rigidly attachd to each other that move together and can bear a load |
| Pulley | Simple machine that is a wheel with a groove in its rim |
| Wedge | A from of inclined plane that tapers from a very thick end to a very thin end |
| Screw | A combination of an inclined plane and a cylinder that has a spiral groove cut into it |
| Efficiency | Measure of work output of a machine compared to the energy input |
| Mechanical Advantage | a comparison of the force needed to do the work directly with the force applied to a machine |
| Electrochemical Cell | A device that converts chemical energy into electrical energy |
| Battery | A combination of two or more electrochemical cells in a series. |
| Watt | unit of pwer equal to 1 joule per second |
| current | The flow of a charge |
| Voltage | Energy carried by charges that make up a current and cause the current to flow through a circuit |
| Transformer | A device that increases or decreases voltage |
| Ine | nature of |
| *com | with together |
| ency | action, state of, quality |
| *ic | nature of |
| *al | related |
| *ad | to towards |
| *age | act of, state of, collection of |
| *form | form, shape |
| *er | one who, that which |
