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8Sci CH1

8th Science CH1 Electricity

TermDefinition
circuit any complete pathway through which electrical current flows; requires a source of potential difference, a conducting path, and resistance
conductor material that allows electrical charges to flow freely from place to place
current rate at which electrical charges flow past a point in a circuit over a specific amount of time
electrical charge concentration of electricity; everything contains electrical charges which can be either positive (+) or negative (-)
insulator material that does not allow electrical charges to flow freely from place to place; insulators help transmit electricity safe from one location to another
like charges similar electrical charges that repel each other
potential difference change in total energy divided by the total electric charge; measured in volts (V ) or voltage; when potential difference stays the same, current decreases as resistance increases
resistance property of materials indicating how much energy is changed to thermal energy and light as an electrical charge passes through them
unlike charges dissimilar electrical charges that attract one another