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学生刚学习物理时,往往能根据学习要求,抓住细微之处,控制认知方向去认识事物;抽象思维尚未入门,思维水平处在肤浅疏散状态,结论多半停留于对表象的认识。因此,在教学之始特别注意多方面进行引导。萘的熔解和凝固,是一个比较复杂而又很重要的实验。使用的仪器较多,现象也不单一,但又是基础实验之一,通过本实验能有效地引导学生排除非目的性因素的干扰,抓住目标,集中思想,仔细观察,
When a student first learns physics, he or she can grasp the subtleties according to the learning requirements and control the cognitive direction to understand things. The abstract thinking has not yet been started. The level of thinking is in a state of superficial evacuation, and the conclusion mostly stays in the understanding of appearance. Therefore, at the beginning of teaching, we must pay special attention to various aspects of guidance. The melting and solidification of naphthalene is a relatively complicated and important experiment. There are many instruments used, but the phenomenon is not single, but it is also one of the basic experiments. Through this experiment, students can be effectively guided to exclude non-target factors of interference, seize the goal, focus on ideas, and observe carefully.