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在人教版八年级物理上册“熔化与凝固”这节教学内容中,为了让学生理解晶体和非晶体在熔化过程中不同的温度变化规律,笔者对海波和石蜡两个熔化实验进行了改进。一、原实验的不足、产生原因及改进方法笔者在教学实践中发现,利用原实验装置进行实验,得到的实验结果是:海波在熔化过程中,温度不断升高。换用冰或萘做实验,结果亦然。这样的实验结果不但无法让学生信服教材中关于“晶体在熔化过程中,尽管不断吸热,但温度却保持不变”这一结论,而
In the PEP eighth grade physics book “melting and solidification ” this section of the teaching content, in order to allow students to understand the crystal and non-crystal melting process in the different temperature changes, the author of the two waves and paraffin melting experiments Improved. First, the lack of the original experiment, causes and improvement methods The author found in the teaching practice, the use of the original experimental device for the experiment, the experimental results obtained are: the sea wave in the melting process, the temperature rising. Change to ice or naphthalene experiment, the result is same. Such experimental results not only failed to convince the students to conclude that the “crystal remained unchanged during the melting process despite constant heat absorption,” while "