Circuit:
A path that allows an electric charge to flow through it.

Current:
The flow of charge in an electrical circuit. Current is measured in amps.

Energy:
The capacity to do work. Forms of energy include light, heat, sound, mechanical and electrical.

Kilowatt-hour (kWh):
The amount of energy transferred by one kilowatt of power in an hour.

Power:
The rate at which energy is transferred, or converted into work. It is usually measured in watts.

Volt:
A volt (V) is the unit used to describe the electrical energy that moves charge around a circuit.

Watt:
A watt (W) is a unit of power. A kilowatt (kW) is 1000 watts.