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控制变量法是自然学科中常用的研究方法,也是初中物理教学中重要的解题方法之一.它能将一些复杂的多变量的物理问题转化为简单的单变量的问题或将一些多因素的抽象的大问题,转化为直观的易于操控的小问题.然而在日常教学中发现,学生在运用控制变量法解题方面掌握的不好.下面笔者将结合比较物理量和实验探究题型中的实例阐明如何帮助学生妙用控制变量法解题.一、在比较物理量题型中的妙用
Control variable method is one of the most commonly used research methods in natural sciences and one of the most important solution to physics teaching in junior high school.It can transform some complicated multivariable physical problems into simple univariate problems or combine some multifactorial Abstract large problems, into intuitive easy to control small problems.However, in daily teaching found that students in the use of control variables to solve the problem is not good .In the following the author will compare the physical quantity and experiment to explore the examples in the question type Explain how to help students magically control the variable method to solve the problem.