测量物质的密度是一个重要实验,它涉及较多实验器材的使用,对考生能力要求较高,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。该知识点通常考查量筒和天平的正确使用与读数、利用密度公式计算物质的密度等。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(即进行误差分析),让 Measurement of material density is an important experiment, which involves the use of more experimental equipment, the ability of candidates is higher, almost every year in the examination will be required, and in the experimental exploration of the points generally larger. This knowledge point usually checks the correct use and reading of graduated cylinder and balance, and calculates the density of substances using the density formula. 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 (that is, error analysis), so