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控制变量法是指自然界发生的各种错综复杂的现象中,把决定某一现象产生和变化的多种因素中的一个或几个设法用人为的方法控制起来,使它们保持不变,然后来比较这一现象中的一个变量。学生通过大量的实际操作、实验探究,寻找各种事物和现象间的联系,在验证前人结论的基础上形成认识,这是研究问题的基本方法。有利于良好习惯和思维方法的形成,它的应用必将产生一场学习方法的革命,为学生今后的发展奠定坚实的基础。
Control Variable Law refers to the various complex phenomena that occur in nature, and one or more of the many factors that determine the occurrence and change of a phenomenon are managed by man-made methods to keep them unchanged and then compared A variable in this phenomenon. Students through a large number of practical operation, experimental exploration, looking for all kinds of things and the connection between the phenomenon, based on the verification of previous conclusions of the formation of understanding, which is the basic method of research. Is conducive to the formation of good habits and thinking methods, its application will surely produce a revolution in learning methods, and lay a solid foundation for the future development of students.