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Science

Simple Electric Circuits

Overview

Students construct a simple circuit using a battery, wire, and bulb, then investigate what materials allow electricity to pass through them.

Learning Objective
Students build a simple electrical circuit and understand what is needed for electricity to flow.

Resources needed

  • One battery or battery pack
  • Insulated wire (two pieces)
  • One small bulb or LED
  • A range of objects to test: coin, pencil, stone, paper, rubber, metal nail

Lesson stages

0 / 7 done
  1. 1 Show the components: battery, wire, bulb.
  2. 2 Connect them in a loop — bulb lights up. Ask: why does it light?
  3. 3 Introduce: electricity flows in a loop called a circuit. Break the loop — bulb goes out.
  4. 4 Ask: what makes a circuit complete? (unbroken loop with a power source).
  5. 5 Test different materials by connecting them into the circuit — which allow electricity to flow?
  6. 6 Sort into conductors (allow flow) and insulators (do not allow flow).
  7. 7 Ask: why do wires have plastic coating? (insulator outside, conductor inside).

Tap a step to mark it as done.

Variations

  • Add a switch — a piece of card with a paper clip that can open and close the circuit.
  • Add a second bulb — compare brightness in series vs parallel.
  • Make a simple conductivity tester to test materials found outdoors.
More information

Teach: circuit, conductor, insulator, current, battery, bulb, switch, complete. A diagram of the circuit with labeled components supports understanding for all learners.

Focus on completing and breaking the circuit before introducing conductors and insulators. Success at lighting the bulb is a powerful motivating experience.

Can students draw a complete circuit diagram? Can they classify at least four materials correctly as conductors or insulators?

A single AA battery, a small length of wire, and an LED can light up with minimal equipment. If no bulb is available, test whether a compass needle deflects near a wire carrying current.

Students often think electricity is used up as it flows around the circuit. Electricity is not consumed — it transfers energy. The battery provides the energy; the bulb converts it to light and heat.

Understanding circuits is the foundation for all electronics. The conductor/insulator distinction explains everything from electrical safety to how switches work.

Activity details
Primary Medium 25–30 minutes 10 minutes prep Small Group Indoor & Outdoor
Topics
Electricity Circuits Conductors