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物理概念是整个物理学知识体系的基础。如果把物理学科比作高楼大厦,那么物理概念就是构成这座大厦的基石。在众多的物理概念当中,许多基本概念都是借助比值来定义的。因此,能否理解比值定义又成了理解物理基本概念的重要前提。笔者在教学实践中发现,充分运用问题图式可以促进学生理解物理基本概念。一、比值定义的含义和问题图式的内涵1.比值定义的含义所谓比值定义法,就是用两个或多个已知物理量“相比”的方式来定义一个新的物理量的方法。在中学物理教材中,用比值定义法定义的物理概念非常
The concept of physics is the basis of the entire system of knowledge of physics. If the physics is likened to a tall building, then the physical concept is the cornerstone of the building. Among the many physical concepts, many of the basic concepts are defined by the ratio. Therefore, the understanding of the definition of ratio has become an important precondition for understanding the basic concepts of physics. The author found in teaching practice, make full use of the problem schema can promote students to understand the basic concepts of physics. First, the meaning of ratio definition and problem Schematic connotation 1. Definition of ratio definition The so-called ratio definition method is to use two or more known physical quantity “compared to ” way to define a new physical quantity method. In high school physics textbooks, the concept of physics defined by the ratio definition is very high