八年级物理上册2.1《质量及其测量》同步练习2北京课改版.doc

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质量及其测量一、填空题 1质量为 1kg 的水,全部结冰以后,体积变大了,冰的质量是 kg如果 1kg 的水全部变成水蒸气,则水蒸气的质量是 kg2“解放牌”载重汽车本身的质量是 3.8t,合 kg= g;一粒人工合成金刚石的质量一般约为 200mg,合 g= kg 二、选择题3一个中学生的质量大约为( )A500kg B50kg C5kg D0.5kg4质量为 2500mg 的物体,它可能是( )A一只羊的质量 B一块橡皮的质量C一本物理书的质量 D一只蚂蚁的质量 5一根硬棒,下列哪种情况下其质量发生了变化( )A用车床车光滑,并制成某零件B在炉中加热至 300C将棒拉成细铁丝D将铁棒带到宇宙飞船上6用天平测量物体的质量的过程中,下列操作中不规范的是( )A用镊子夹取砝码,以免砝码生锈B待测物体放在天平的左盘里,砝码放在天平的右盘中C在测量中,调节横梁上的螺母,使指针指到刻度盘的中央,然后读出质量数D不用天平测量过大,超过天平测量范围的物体参考答案一、 11、1;23.810 3,3.810 6,0.2,210 -4;二、3B;4B;5A;6C;

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