初中物理教学中经常用到控制变量法,它的基本含义是对某个物理量和其他多个因素相互之间关系的研究中,一般要先假定其他几个因素恒定不变,将研究的注意力转移到一个因素上来,对每一个物理量的研究都依次使用该种方法,最后得出相应的物理规律.实施控制变量法的关键条件是对一个物理问题有多种猜想,找出相关的因素.然后通过实验论证.一、控制变量法在物理教学中的有效运用 The control variable method is often used in junior high school physics teaching. Its basic meaning is the study of the relationship between a certain physical quantity and other multiple factors. It is generally assumed that the other several factors are constant and will be the focus of study. Transferred to a factor, the study of each physical quantity uses the method in turn, and finally the corresponding physical law is obtained. The key condition for implementing the control variable method is to have a variety of conjectures on a physical problem and find the relevant factors. Then through the experimental demonstration. First, the effective use of the control variable method in physics teaching