“物质的密度”是中学物理最基本、最重要的概念之一.首先,密度是学生后续学习液体压强、浮力等知识的基础;其次,密度是学生涉及的物质的物理属性,它是用比值法定义的物理量.对于比值定义的物理量,一般比较容易测量,这种教学应以实验为基础,采用探究的方式进行设计教学,不仅能调动学生学习的积极性,更重要的是建立密度概念的科学方法对于学生学习物质的其他物理属性具有代表意义.如何让学生更好地掌握知 “Density of matter ” is one of the most basic and important concepts in secondary physics.Firstly, density is the basis of students’ subsequent knowledge of liquid pressure, buoyancy and so on. Secondly, density is the physical property of the material involved in a student. The physical quantity defined by the ratio method is generally relatively easy to measure for the physical quantity defined by the ratio. This teaching should be designed experimentally based on the inquiry, not only to mobilize the enthusiasm of students to learn, but more importantly to establish the concept of density The scientific method for students to learn the physical properties of the other representatives have the meaning of how to make students better grasp of