You can build an earthquake alarm working model with a school building concept, where the alarm is placed in the compound to alert students and people.
Materials Needed:
Cardboard & Color Paper (for the school building, compound, and landscape)
Metal Ball or Pendulum (for vibration detection)
Two Metal Strips or Aluminum Foil (to act as contact points)
9V Battery (to power the circuit)
Buzzer & LED Light (to signal the alarm)
Spring (Optional, for better sensitivity)
Glue, Scissors, Tape (for assembly)
Steps to Build:
1. Create the School Building & Compound
- Use cardboard to make a school building with classrooms and windows.
- Design a school compound with gates, trees, and a playground using color paper.
- Place the earthquake alarm system in the compound (a small box near the school entrance).
2. Build the Earthquake Alarm System
- Hang a metal ball or a small pendulum from a string inside the alarm box.
- Position two metal strips (aluminum foil or wires) near the pendulum.
- The pendulum should be freely swinging but not touching the strips.
3. Connect the Circuit
- Attach the metal strips to a 9V battery and a buzzer.
- When the ground shakes, the pendulum touches the strips, completing the circuit.
- This activates the buzzer and LED light, alerting students and staff.
4. Demonstration & Working
- Shake the model gently to simulate an earthquake.
- As the pendulum swings and touches the metal strips, the buzzer sounds and the LED light flashes.
- This represents a real-life earthquake alarm that warns people in schools.