物理量是建立物理知识体系的基石,是学生认识物理规律和应用物理知识解决实际问题的基础.如何帮助学生有效建构物理量的概念是我们在教学中应当思考的问题.2013年苏科版初中物理教材中对于某些物理量概念的引入利用了比值的方式,这种定义有利于学生通过计算掌握,但感觉上对于其本质的含义却忽略了,这对学生今后的学习可能会产生不利的影 Physical quantity is the cornerstone of the establishment of physical knowledge system, is the basis for students to understand the laws of physics and the application of physical knowledge to solve practical problems.How to help students effectively construct the concept of physical quantity is what we should think in teaching. In the concept of the introduction of certain physical quantities using the ratio of the way, this definition is conducive to students through the calculation of control, but the sense of the meaning of its own has been ignored, which students may have adverse effects of future learning