地震预报的方法很多 ,作为中学生可采用一些观测地震的土方法、土仪器。“倒立瓶地震报警器”是将瓶子倒立 ,地震时瓶被晃倒 ,电路接通 ,便发出警报。这对于监视地震、保护群众安全会起到一定作用。一、工具与材料电铃 ,电烙铁 ,小木板 ,铁丝 ,金属片 ,电线 ,酒瓶 ,电池 ,螺丝 There are many methods for earthquake prediction. As a middle school student, some earth methods and earth instruments for observing earthquakes can be used. “Inverted bottle earthquake alarm” is the bottle upside down, the bottle was knocked down during an earthquake, the circuit connected, they issued an alarm. This will play a role in monitoring earthquakes and protecting the safety of the masses. First, the tools and materials Bell, electric iron, small wood, wire, sheet metal, wires, bottles, batteries, screws