Earthquake Detector
Ages: 10+
An Earthquake Detector helps to alarm human beings from an upcoming earthquake so that we can take some precautionary action to prevent both human lives and extensive damage to property. When shake the detector to simulate an earthquake, the copper wire touches the screw eye to form a complete electric circuit, a complete loop with electricity flowing the way it is supposed to flow: from the battery, to the component (buzzer and LED), and back to the battery again.