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测量物质的密度是一个重要实验,它涉及较多实验器材的正确使用,对学生能力要求较高,各地中考几乎每年必考,且在实验探究题中所占分值一般较大。常规考法是量筒和天平的正确使用与读数,然后利用密度公式计算出物质的密度。这些年随着新课标的实施,密度测量的考查越来越灵活,特别是围绕密度测量值比真实值偏大还是偏小(即进
Measurement of material density is an important experiment, which involves the correct use of more experimental equipment, higher requirements for students’ ability, the mid-term examinations will be taken almost every year, and the scores in the experimental inquiry generally will be larger. The conventional test method is the correct use of cylinder and balance readings, and then use the density formula to calculate the density of matter. In recent years, with the implementation of the new curriculum standard, more and more flexible measurement of density measurement, especially around the density measurement is larger or smaller than the true value