由于易受到平时生活经验的表象干扰,以及思维定势的影响,有些同学在求解质量和密度问题时,常常出现顾此失彼、考虑不周的现象,导致错解产生.易错点一:对质量的概念理解易错1.物体所含物质的多少叫作物体的质量.质量是物体的一种属性,物体的质量不随物体位置、形状、状态的变化而改变.部分同学容易错误地认为物体的位置、形状、状态发生变化会导致其质量发生改变.2.质量的国际单位是千克,符号为kg.常用的质 Due to the interference with the appearance of ordinary life experience and the influence of the mindset, some students often appear to be misunderstood and ill-considered in their solution to the problem of quality and density, resulting in the wrong solution. Concept understanding error-prone 1. The amount of material contained in an object is called the quality of an object.Quality is an attribute of an object and the quality of the object does not change with the position, shape, and state of the object.Participants tend to mistake the position of the object , The change of shape and state will lead to the change of its quality.2 The international unit of quality is kg and the symbol is kg.