Conductors and Insulators

Conductors and Insulators: How Does Electricity Flow?

By Anthony Mapalo

Introduction to Electricity Flow

• Electricity powers our world, from lights to devices.

• Some materials allow electricity to flow, while others do not.

• These materials are classified as conductors or insulators.

What are Conductors?

• Definition: A conductor allows electricity (or heat) to pass through easily.

• Why? Conductors have loosely bound electrons that move freely.

• Examples: Copper, silver, aluminum, iron.

• Real-world connection: Copper wires in homes carry electricity.

Open Ended

Check-in Question:

Why do you think metal wires are covered in plastic?

What are Insulators?

• Definition: An insulator does not allow electricity or heat to flow easily.

• Why? Insulators have tightly bound electrons that do not move freely.

• Examples: Rubber, plastic, wood, glass.

• Real-world connection: The rubber or plastic coating on wires prevents electric shock.

Open Ended

Check-in Question
If you were building a tool to handle electrical wires, would you want the handle to be made of metal or rubber? Why?

How do we test Conductors and Insulators?

• We can build a simple circuit to test materials.

• Components: Battery, wires, light bulb.

• What happens?

  • If the bulb lights up → The object is a conductor.

  • If the bulb stays off → The object is an insulator.

How do we test Conductors and Insulators?

• We can build a simple circuit to test materials.

• Components: Battery, wires, light bulb.

• What happens?

  • If the bulb lights up → The object is a conductor.

  • If the bulb stays off → The object is an insulator.

Multiple Choice

Classify this item as a conductor or an insulator.

• Conductor

• Insulator

Multiple Choice

Classify this item as a conductor or an insulator.

• Conductor

• Insulator

Multiple Choice

Classify this item as a conductor or an insulator.

• Conductor

• Insulator

Multiple Choice

Classify this item as a conductor or an insulator.

• Conductor

• Insulator

Multiple Choice

Classify this item as a conductor or an insulator.

• Conductor

• Insulator

Multiple Choice

Classify this item as a conductor or an insulator.

• Conductor

• Insulator

Multiple Choice

Classify this item as a conductor or an insulator.

• Conductor

• Insulator

Why does this matter?

• Understanding conductors and insulators helps with safety and technology.

• Engineers and electricians use this knowledge when designing circuits and appliances.

• Everyday life: Phone chargers, power lines, and electric tools rely on the right materials.

Summary

• Conductors allow electricity to flow (e.g., metals).

• Insulators prevent electricity flow (e.g., rubber, wood, plastic).

• We use both to control and direct electricity safely.

• Experimenting with circuits helps us understand these properties better!

Thank You!

Questions?

• Discuss your biggest takeaway from today’s lesson!

Multiple Choice

What is a conductor?

• A material that allows electricity to flow through it easily

• A material that blocks electricity from flowing

• A material that absorbs electricity

• A material that repels electricity

Let's Practice

Multiple Choice

Which of the following is the best conductor of electricity?

• Rubber

• Glass

• Copper

• Plastic

Multiple Choice

What is the main reason metals are good conductors?

• They have a rough surface

• Their electrons move freely

• They are magnetic

• They are shiny

Multiple Choice

Why are power lines covered in plastic or rubber?

• To make them look better

• To increase the flow of electricity

• To prevent electricity from escaping and keep people safe

• To help electricity move faster

Multiple Choice

Which of the following is an insulator?

• Aluminum

• Gold

• Plastic

• Silver

Multiple Choice

What will happen if you place a wooden stick between the wires in an electrical circuit?

• The circuit will remain complete, and the bulb will light up

• The circuit will break, and the bulb will not light up

• The electricity will speed up

• The wooden stick will become a conductor

Multiple Choice

Which of these household items is a conductor?

• Rubber gloves

• Metal keys

• Wooden spoon

• Glass bottle

Multiple Choice

What property makes rubber a good insulator?

• It is flexible

• It does not allow electricity to pass through

• It is lightweight

• It melts easily

Multiple Choice

Which of the following statements is true?

• All metals are insulators

• Glass and rubber are good conductors

• Water is always an insulator

• Most metals are good conductors

Multiple Choice

Which material should be used to make the handle of an electrician's tool?

• Copper

• Aluminum

• Rubber

• Steel