通过密度秤的制作使用 ,引导学生钻研一些物理问题 ,加深对物理知识的理解。1　密度秤的构造　　密度秤的构造如图 1 ,它与普通的杆秤类似 ,但比杆秤更简单。它有秤杆、秤钩、图 1提纽、秤锤 ,秤杆上有从提纽开始的均匀刻度 ,另有待测密度的物体Ｇ物 或待测密度的液体、水。2　 Through the use of density scales, students are led to delve into some physical problems and deepen their understanding of physical knowledge. 1 Structure of the Density Scale The structure of the density scale is shown in Fig. 1. It is similar to an ordinary steelyard scale but simpler than a steelyard scale. It has a weighing bar, a hook for the scale, a button for lifting a new button, a balance hammer, a uniform scale on the weighing bar starting from Tikhin, and an object G to be measured for density or liquid and water to be measured. 2