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物理学是一门以实验为基础的学科。在物理课堂教学中,就演示实验而言,它是物理教学中的一种重要手段。一个可见度大、现象清晰的演示实验,不仅能为学生生动地积累感性材料,而且能形象、直观地揭示物理概念的本质和物理现象的规律,有效地突破教学内容的难点。多年来,笔者在物理教学过程中,通过对一些演示实验的不断改进、反思和反复实践,有了一些新的做法和深刻的体会,同时也取得了良好的教学效果。下面就以苏科版初中物理教材中的“点火爆炸”演示实验为例进行具体阐述。在苏科版九年级上册教材第十二章第四节中,
Physics is an experiment-based discipline. In physics classroom teaching, it is an important method in physics teaching in terms of demonstration experiment. A demonstration experiment with large visibility and clear phenomena not only can vividly accumulate perceptual materials for students, but also vividly reveals the laws of the nature and the physical phenomena of physical concepts and effectively breaks the difficult points of teaching contents. Over the years, the author has made some new practices and profound experiences through continuous improvement, reflection and repeated practice of some demonstration experiments in the process of physics teaching, and also achieved good teaching results. The following Su Ke version of junior high school physics textbooks “ignition explosion ” demonstration experiment as an example to elaborate. In the Su Ke version of ninth grade on the textbook Chapter 12 Chapter IV,