八年级物理上册2.1物体的尺度及其测量练习1无答案新版北师大版20190122440.doc

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1、1物体的尺度及其测量1用厚刻度尺测量物体的长度,在图中测量方法正确的是( )2单位变换:(l)25 厘米=_微米;(2)52 毫米=_米;(3)900 秒=_分;(4)0.4 时=_秒;(5)400 分米 3= 米 3(6)100 厘米 3= 米 33图中的刻度尺的最小刻度值是 厘米,物体的长度 是 厘米4如图放置的刻度尺测量木块长度是 1.76 厘米,它与木块的真实长度之间的差值是由于_造成的,这是_避免的5同一长度的五次测量记录是:25.1 毫米,25.2 毫米,27.5 毫米、25.3 毫米、25.5 毫米,其中一次明显是错误的,它是_,根据以上测量记录,这一物体的长度应记作_参考答案1

2、C); 2.(1)2.5 ;(2)0.052;(3)15;(4)1440;(5)0.4;(6)110 -4 ;31,4.4; 4错误,可以; 527.5 毫米;25.3 毫米探究活动课题:查阅关于长度的一些单位活动的组织:以小组为单位教师指导:1. 提供关于长度的一些学史资料2. 不同国家中关于长度的不同单位3长度的国际单位制中,单位的换算关系评价:1资料来源的丰富程度2内容的祥实程度3资料本身的丰富程度探究活动课题:2收集不同国家和地区长度单位在历史发展中的演变过程,写出体会活动的组织:以小组为单位资料来源:1可以到图书馆查找资料2可以上网收集资料评价:1. 资料内容的祥实程度2. 来源的丰富程度3. 体会的深刻程度

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