Demonstrates how heat from the Earth’s core is used to generate electricity using steam turbines, and how that electricity is transmitted via transmission towers and poles to light a bulb.
In this geothermal model, heat from deep inside the Earth heats underground water, producing steam. This steam rises through a pipe and spins a turbine, here represented by an L-shaped robo motor.
The turbine is connected to a DC motor, which generates electricity. The electricity is transmitted through power lines (made from chopsticks) and lights up a streetlight.
This shows how geothermal energy is a clean, renewable source of electricity that doesn’t produce pollution.”
Demonstrates how heat from the Earth’s core is used to generate electricity using steam turbines, and how that electricity is transmitted via transmission towers and poles to light a bulb.
Materials Required:
- Cardboard box (for earth layers & plant structure)
- L-shaped robo motor (acts as steam turbine)
- DC motor + small LED (light pole)
- Chopsticks / skewers (for power transmission towers)
- Wires & glue
- Plastic tubing or straws (to show steam pipe)
- Paint, markers, paper labels
- Fevicol or glue gun
- Transparent plastic or cotton (for steam effect)
- Small plastic cup / kettle (hot water as heat source)
- Switch (optional)
- Battery (if you want dual-mode with or without real steam)
Video Step-by-Step Construction of the working model :
1. Create Earth Layer Base
- Use a cardboard box laid flat to show Earth cross-section.
- Paint and label layers: Crust, Mantle, Core.
- Place a plastic cup filled with hot water inside (acts as underground heat).
2. Insert Steam Pipe
- Attach a plastic straw or tubing from the hot water cup to the surface to represent steam rising.
3. Mount the Robo Motor (Steam Turbine)
- Fix the L-shaped robo motor above the pipe — the rising “steam” (symbolically or by blowing air) turns the turbine.
- The turbine shaft connects to a DC motor to generate electricity.
4. Generate Electricity
- Connect the DC motor’s output to an LED or light bulb mounted on an electrical pole made from cardboard or skewers.
5. Build Power Transmission Towers
- Use chopsticks/skewers + thread or wires to make 2–3 towers.
- Stretch wires between them from the turbine to the pole with the light.
6. Light Pole
- On the other end, mount a cardboard electric pole with a small LED lamp.
- When the motor rotates, the LED lights up, showing thermal to electrical energy conversion.