Electrical Charge is a fundamental property of electrons and protons. Electrons have a negative charge and protons have a positive electric charge.

Electrical charges of particles can either be positive or negative and the electrical charge causes particles to repel or attract each other.

Electrical Current is the flow of electrical charge.

An electrical current is how electricity is transferred from a battery to a charging object.

Electrical Circuit is a path for transmitting energy. It contains a voltage source that maintains an electrical potential, a follow, and a device where work is done by the electrical potential.

To power a lightbulb, a electrical circuit needs to be created in order to transfer electrical energy from the battery to the lightbulb.

Conductors of Electricity are materials that allow energy to flow through it.

Different kinds of metals are good conductors of energy since they allow energy to pass through them. Wires, made out of metals are often used in circuits to allow energy to flow from one object to another.

Insulators are materials that are poor conductors of heat.

Wood is a good insulator since it has many air pockets, making it hard for heat to transfer between it.

An incomplete circuit is a circuit that is disconnected at a point in the path.

There is a gap in the circuit making it incomplete and not able to allow energy to flow from a battery to the object needing power.

A complete circuit is a circuit that is a connected loop that has energy flowing through it.

A complete circuit is needed in order to power on a lightbulb by allowing the energy to flow from a battery to the lightbulb to power it.

A series circuit is a circuit that has all objects arranged on a single path.

A parallel circuit is a circuit that contains multiple pathways and branches that has each electrical object on a different branch.

Both a parallel and series circuit can power multiple lightbulbs. The difference between the two is that the lightbulbs are on a singular path in a series circuit, while a parallel circuit has a lightbulb in different pathways all connected to the circuit.