论文部分内容阅读
《密度》这章节的教学要求是通过实验理解密度,会测量固体和液体的密度,能解释生活中一些与密度有关的物理现象。从这些课标要求来分析,密度知识重在通过实验理解密度、提升同学们应用密度解释、解决生活中的现象和问题的能力。因此,要使这些目标顺利达成,就要对相关知识效突破。具体可这样做:一、吃透密度概念书中密度的定义是某种物质的物体其质量与体积的比值,而这个定义是建立在实验探究的基础之上的。例1小明在做“探究密度概念的建构”实验时,得到如下数据(见下表):
The teaching of “Density” in this section is to experimentally understand the density, to measure the density of solids and liquids, and to explain some of the density-related physical phenomena in life. From the requirements of these curriculum standards to analyze, the density of knowledge focuses on the understanding of density through experiments to enhance the students to use density to explain and solve the phenomenon of life and the ability of the problem. Therefore, to achieve these goals smoothly, we must break through the relevant knowledge. Specific to do this: First, the concept of density of penetration density book is the definition of the substance of a certain mass and volume ratio, and this definition is based on experimental exploration. Example 1 Xiao Ming When doing the “Build Density Concept Construction” experiment, the following data is obtained (see the following table):