八年级物理上册2.1质量及其测量习题北京课改版.doc

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质量及其测量习题一、选择题:1、一个苹果的质量大约是多少?( )A、0.015t B、0.015kg C、1500g D、150000mg2、100g 的水结成冰后,质量为多少?( )A、大于 100g B、小于 100g C、等于 100g D、无法判断二、实验题:3、在调节天平平衡时,发现指针左偏,应调节_(A.平衡螺母;B、游码)在测量物体质量的时候,发现放上最小的砝码还无法让天平平衡,这时,应当调节_(A.平衡螺母;B、游码)4、小明同学在用天平测物体质量的实验中,天平调节平衡后,小明按图 1所示的方法来称量物体的质量,小华立即 对小明说:“你操作时犯了两个错误 ”小 华所说的两个错误是: (1)_(2)_(3)天平再次平衡后,所用砝码和游码位置如图 2所示,那么小明所称量物体的质量是_g三、课后提高:1、你有办法测量一枚邮票的质量吗?请写出实验步骤图 1图 22、如何测量液体的质量呢?请写出实验步骤

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