Electricity is a flow of energy through a source and through a receiver in a closed path.

Electricity can be transfered from a source to a receiver.

A closed circuit creates a transfer of electricity, an open circuit does not. A switch is used to open and close a circuit.

A fuse or circuit breaker opens a closed circuit for protection when a circuit overheats.

Light bulbs in a series circuit will go out if one is unscrewed.

Light bulbs in a parallel circuit will remain lit when another is unscrewed.

Electricity in circuits can produce light, heat, sound, and magnetic effects.

Electrical energy can be produced from heat, light, magnetism, and chemical energy.

Electricity flows easily through a conductor and flows with difficulty in a conductor.