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控制变量法,就是在研究和解决问题的过程中,对影响事物变化规律的因素或条件加以人为控制,每次只改变一个因素,控制其他因素不变,分析所研究的物理问题与该因素的关系。它把多因素的问题转变为多个单因素的问题,分别加以研究,最后再综合解决。控制变量法是科学探究的一种重要方法,娴熟地掌握控制变量法对学习初中物理电学能起到重要的作用。本文就如何利用控制变量法学习初中物理电学做一探讨。
Controlled variables approach is to control the factors or conditions that affect the changing laws of things in the process of researching and solving problems, changing only one factor at a time and controlling the other factors, analyzing the physical problems studied and the factors relationship. It turns the multi-factor problem into a number of single-factor problems, studies them separately, and finally solves the problem comprehensively. Controlled variable method is an important method of scientific inquiry. Skillfully mastering the controllable variable method plays an important role in learning physical physics of junior high school. This paper discusses how to use the control variable method to study junior physics.