填空题在“测定物质密度”的实验中，用：____可以测出物体的质量，若物体的形状不规则，则可以用____法测出它的体积，然后通过计算得出物质的密度．因此用这种方法测物质密度属于____（选填“直接”、“间接”）测量．
填空题
在“测定物质密度”的实验中，用：____可以测出物体的质量，若物体的形状不规则，则可以用____法测出它的体积，然后通过计算得出物质的密度．因此用这种方法测物质密度属于____（选填“直接”、“间接”）测量．
参考解析
解析：
测物体密度的原理是ρ＝m／V，需要用天平测出它的质量m，液体和形状不规则的固体体积可以根据排水法测出，然后通过计算得出物质的密度．因此用这种方法测物质密度属于间接测量．
测物体密度的原理是ρ＝m／V，需要用天平测出它的质量m，液体和形状不规则的固体体积可以根据排水法测出，然后通过计算得出物质的密度．因此用这种方法测物质密度属于间接测量．
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