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实验一 用刻度尺测长度一 实验预习1.在国际单位制中,长度的主单位是_____,其余单位是_____、____、_____、_____.测量长度的基本工具是_____.2.使用刻度尺前要注意观察它的_____、_____和_____.3.物理实验中测长度,要估读到刻度尺____________________.4.用刻度尺测出某物体长度是0.125米,其中估计值是_____,准确值是__________,刻度尺的最小刻度是_____,有效数字是_____.5.用刻度尺测量长度时,要将刻度尺__________,不要歪斜.如果零刻度线磨损,要将刻度尺的某一__________与被测物体起始测量边对齐,读数时,视线要与刻
Experiment 1 Scale length to measure an experiment Prep 1. In the International System of Units, the main unit of length is _____, and the remaining units are _____, ____, _____, _____. The basic tool for measuring length is _____.2. Before measuring the scale, pay attention to its _____, ___, and _____.3. In the physical experiment, measure the length, and read the scale ____________________. 4. Use a scale to measure the length of an object to be 0.125 meters. The value is _____, the exact value is __________, the minimum scale of the scale is _____, the valid figure is _____.5. When measuring the length with the scale, you must __________ the scale, do not skew. If the zero scale is worn To align a certain __________ of the scale with the starting measurement side of the measured object, and to read the sight line