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物理是以实验为基础的学科,亲自动手实验是学生学习物理的重要方式。然而,教材中的实验总存在着现象不明显或操作不方便的缺陷。笔者现对初中物理实验教材中的几个重要实验进行改进,以供同仁参考。一、焦耳定律实验人民教育出版社(以下简称人教版)出版的八年级物理下册第48页“焦耳定律”演示实验,教科书是用2个烧瓶中的煤油受热后体积膨胀的不同办法来显示它们吸收热量的不同。这个方案繁锁且实验现象不明显。为此,笔者对该实验做如下改进。
Physics is based on the experimental discipline, hands-on experiment is an important way for students to learn physics. However, there is always a flaw in the teaching materials that the phenomenon is not obvious or the operation is inconvenient. The author is now junior high school physics experiment teaching several important experiments to improve, for colleagues reference. Joule’s Law Experiment People’s Education Press (hereinafter referred to as the People’s Education Edition) published the eighth grade physics book on page 48 “Joule’s law ” demonstration experiment, the textbook is the use of two flasks of kerosene after heating the volume expansion of different The way to show how different they absorb heat. The program is cumbersome and the experimental phenomenon is not obvious. To this end, the author made the following improvements to the experiment.