| A | B |
|---|
| alkaline | substance that has a pH > 7 |
| anode | negative terminal of a battery |
| battery | two or more connected cells that produce a direct current by converting chemical energy to mechanical energy |
| cathode | positive terminal of a battery |
| conductor | a substance through which electricity readily flows |
| electricity | form of energy that can produce light, heat, magnetism and chemical changes, and can be generated by friction, induction or chemical changes |
| electric cell | a single unit for conversion of chemical into electric energy |
| electric current | flow of electricity through a conductor or transmitter |
| electric motor | motor powered by electricity |
| electrodes | the anode and cathode of an electric cell are |
| electrolyte | a substances that ionizes when dissolves: acids, bases and salts |
| electromagnet | a piece of soft iron that becomes a strong magnet when electricity is run through it |
| energy | may be electrical, chemical, thermal or nuclear but is always measured by work donw |
| insulator | a substance through which electricity cannot readily flow |
| lodestone | a piece of magnetite that posses polarity and attracts iron and steel |
| magnet | a metallic substance capable of attracting iron |
| magnetic field | the lines of force around a magnet or an electric current form its |
| magnetic poles | the ends of a magnet |
| static electricity | form of electricity in which the electric charges are stationary |
| terminal | a position in a circuit or device at which a connection is usually established or broken |
