| A | B |
|---|
| CHARGE | the property that causes objects to electrically attract or repel other objects. There are two types of charge, positive and negative. An object which has no charge is neutral. |
| ELECTRICITY | the presence and movement of electrical charges |
| ATOM | the smallest complete particle of matter |
| PROTON | the positively charged type of particle at the center of an atom |
| NEUTRON | the non-charged or “neutral” type of particle at the center of an atom. |
| ELECTRON | the negatively charged particle that revolves around the nucleus |
| CONDUCTOR | an element or compound in which some electrons can move freely from one atom or molecule to another |
| INSULATOR | an element or compound in which all electrons are bound to specific atoms or molecules, and cannot normally move from one to another. |
| STATIC ELECTRICITY | electricity characterized by stationary charges on objects |
| CURRENT | the flow of electricity |
| AMPERE | the basic unit of measure of current, abbreviated “amp” or A. |
| ELECTROMOTIVE FORCE | abbreviated “EMF,” the force which causes electrons to move; at an atomic level, it is the electrical fields of protons and electrons acting on each other. The mathematical symbol is E or V. |
| VOLT | the basic unit of measure of EMF, abbreviated V. |
| RESISTANCE | interference with the flow of electrons, an electrical kind of “friction.” |
| OHM | the basic unit of measure of resistance, denoted by the Greek letter Omega. |
| RESISTOR | an object deliberately made to have significant resistance |
| POWER | the rate at which energy is consumed or converted from one form to another. Electrical power is voltage times current. The mathematical symbol for power is P. |
| WATT | the basic unit of measure of power, abbreviated W. |
| JOULE | power over time; one watt consumed or converted for one second, also called a watt-second. |
