密度是物质的一种特性,每一种物质都有一定的密度,它与物体的质量,体积无关只与物质的种类和状态有关,在实际测量时我们往往应用的是取样法,而且还要联系实际,不得有违具体题目中所包含的科学道理和社会问题。常用的测量是根据ρ=m/V的原理,这是一种间接测量法,即需要先测量物体的质量和体积,然后根据公式计算得到,对固体和液体密度的测量,步骤和侧重点不同。一、固体密度测量方法 Density is a property of matter. Each substance has a certain density. It has nothing to do with the quality and volume of the object but only with the type and state of the substance. In the actual measurement, we often use the sampling method, but also Contact with the actual, shall not be inconsistent with the specific topics contained in the scientific truth and social issues. Commonly used measurement is based on the principle of ρ = m / V, which is an indirect measurement method, namely the need to measure the mass and volume of the object first, and then calculated according to the formula, the measurement of solid and liquid density, steps and focus on different . First, the solid density measurement method