一、问题的提出苏科版《物理》八年级(上)教材第二章第三节《熔化和凝固》在引入熔化和凝固两个概念后,通过让学生完成“冰的熔化”实验探究总结出晶体的熔化特点。利用冰来做熔化实验也是目前国内几种主流初中物理教材采纳的方案(选择冰贴近学生的生活)。但此实验由于实验过程不易控制、实验结果误差较大等因素,导致学生对晶体的熔化特点难以得出正确的结论,甚至会形成错误的概念。观摩省内外公开课、优秀课,因为上述原因,教学效果欠佳。总之,不少物理老师着力改进实验,但没能从根本上解决问题。本人用传感器研究熔化与凝固现象,实验结果理 First, the issue raised Suke version of “Physics” eighth grade (on) textbook second chapter third “melting and solidification” in the introduction of the two concepts of melting and solidification, by allowing students to complete the “ice melting” experiment Explore the melting characteristics of the crystal summed up. The use of ice to melt experiments is also currently the mainstream of several domestic junior high school textbooks adopted program (choose ice close to the student’s life). However, this experiment is difficult to control due to the experimental process, the experimental results of large errors and other factors, leading to the characteristics of the melting of the crystal difficult for students to draw the correct conclusion, or even the formation of the wrong concept. See inside and outside the open class, excellent class, because of the above reasons, poor teaching effectiveness. In short, many physical teachers are trying hard to improve the experiment, but they failed to solve the problem fundamentally. I use the sensor to study the phenomenon of melting and solidification, experimental results