八年级物理上册1.1《长度和时间的测量》同步练习2北京课改版.doc

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1、一、长度和时间的测量能力训练一、填空题1在国际单位制中,长度的单位是_,它的符号是_,测量长度常用的工具是_;时间的单位是_,它的符号是_,测量时间的常用工具是_2现有 10 m,2 m,1 cm,1 mm,1m 共 5 个长度值,请选择其中一个对号入座壹角硬币的厚度接近于_,小手指的宽度接近于_,教室门的高度接近于_3测量时,测量工具越精密,误差就越_,但是误差是_避免(填“可以”或“不可”)的,为了减小误差,可以采用多次测量的_作为测量结果4如图所示,用刻度尺测量一木块的长度,则刻度尺所显示的木块的长度为_,其中,准确值为_,估计值为_所使用的刻度尺的分度值为_,量程为_二、选择题1关于误

2、差,下列说法中不正确的是( )A误差的产生和测量工具有关B真实值与测量值之间的差异叫做误差C误差虽然不可避免,但可以尽可能减小D以上说法都不正确2在用刻度尺测量物体长度的实验中,纪录数据时( )A可只记录数值,不需要记录单位B可只记录单位,不需要记录数值 C只要记录准确值,并注明测量单位即可D既要记录准确值和估计值,也要注明测量单位3现在通用的鞋的号码数是指人的脚跟到趾尖的距离的 cm 数,一位同学想请人在外地给他买一双合适的球鞋,他利用手头仅有的一把受潮膨胀的木尺测出自己的脚长是 24 cm,则他应该买下面列出的那个号的鞋最合适( )A23 号的B24 号的C24 号半的D23 号半的4某同

3、学正确测量出某物体的长度是 3667 cm,则他所使用的刻度尺的分度值、此数据的准确值和估计值分别是( )A1 mm,3660 cm,007 cmB1 cm,366 cm,007 cmC1 cm,360 cm,067 cmD1 mm,366 cm,007 cm三、计算题1激光是测量距离最精确的“尺子” ,它的射程非常远,利用它可以从地球射向月球,再从月球反射回地球从发射激光到接收到它返回的信号,共用时 25 s,已知光速为3108 m/s,求地球到月球的距离是多少?2从空中拍摄到一卫星发射基地的照片,它的长为 82 cm,宽为 41 cm现已知照片与实物的比例是 1200000,求该基地的实际长和宽各是多少?参考答案一、填空题1米 m 刻度尺 秒 s 秒表21 mm 1 cm 2 m3小 不可 平均值4258 cm 25 cm 008 cm 1 mm 3 cm二、选择题1D2D3C4D三、计算题137510 8 m216410 3 m 8210 3m

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