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新课程标准的教学目标之一就是通过实验再现物理概念和知识的形成过程和研究方法.因此,近几年的中考在形式和内容上都更加注重考查实验,注重孝查知识的形成过程与研究方法.密度是表征物质物理属性的一个重要的物理量,测定物质的密度具有一定的实际意义.由于密度知识与初中物理中压强、浮力、杠杆等知识密切相关,具有较强的综合性,因而密度的测定是各地中考物理实验命题的一大热点.本人根据多年的教学经验将常用的
One of the teaching goals of the new curriculum standards is to reproduce the process of formation and research methods of physical concepts and knowledge through experiments. Therefore, in recent years, the intermediate examinations have placed more emphasis on examination experiments in form and content, focusing on the formation process and research of filial examination knowledge. Methods. Density is an important physical quantity that characterizes the physical properties of a substance. Measuring the density of a substance has a certain practical significance. Because density knowledge is closely related to knowledge of pressure, buoyancy, and leverage in junior middle school physics, it has a strong comprehensiveness and therefore density. The determination is a hot topic in the physics experiment propositions in various local examinations. I will use it based on many years of teaching experience.