在物理教学实践中,笔者发现苏科版八年级教材中的一些实验存在操作不便、实验装置不密封、难以读数等问题,现对这些实验进行如下改进。一、声音能在固体中传播的实验改进1.原实验设计:学生将衣架悬空挂在细绳的中央,伙伴用铅笔轻轻敲打衣架;再把细绳绕在食指上,并用食指堵住双耳,伙伴用铅笔敲打衣架,听者比较两次声音的响度,体验固体可传声且传声效果比空 In the practice of physics teaching, I found that some experiments in eighth grade textbook of Suke version have the following problems: inconvenient operation, unprotected experimental device, difficult reading, etc. First, the sound can be spread in the solid experimental improvements 1. The original experimental design: students hang the hanger hanging in the center of the string, the partner gently tap the hanger with a pencil; then the string around the index finger, and with the index finger to block the double Ear, partner beat the hanger with a pencil, the listener compares the loudness of the sound twice, the experience of solid sound can be transmitted and sound effects than empty