Static electricity

When positive or negative charges no longer balance

Electric current

An electric charge in motion

Resistor

Objects that transfer energy to other forms of energy (lightbulb)

Friction

A force that acts when two surfaces rub together

Series circuit

Path where current flows only one way

Parallel circuit

Has two or more paths in which a charge can flow

Conductor

Material through which an electric charge can move easily

Insulator

Material through which an electric charge moves slowly

Filament

A thin coiled wire that can get hot without melting

Electrical energy

Is transformed from one place to another type of energy such as motion, sound, heat or light