“质量与密度”是初中物理的重点内容,也是考试的热点之一.同学们在学习这些知识的时候,往往会出现种种错误.下面是对常见易错点进行剖析,希望对同学们的学习有所帮助.易错点1:不明确质量变化的原因,把质量和密度混为一谈质量不随物体的形状、状态、位置和温度的改变而改变.密度的大小只与物质的种类、状态、温度有关,与其他因素(质量、体积)无关. “Quality and density ” is the focus of junior high school physics, but also one of the hottest exams.Students learn this knowledge, often there will be a variety of errors.The following is the analysis of common error-prone points, I hope the students Easy to make mistakes 1: No clear reason for quality change, quality and density are mixed Quality does not change with object shape, state, location and temperature changes The size of the density only with the type of substance, state, Temperature-related, and other factors (quality, volume) has nothing to do.