2021年八年级上册物理期中考第一章知识点.pdf

八年级上册物理期中考第一章知识点|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 4 页第 2 页八年级上册物理期中考第一章知识点最让我快乐的是什么?是学习，接下来看看查字典物理网为大家推荐的八年级上册物理期中考第一章知识点，即使在家里也能快乐的学习呀!1、认识刻度尺：要做到“三看：(1)看刻度尺的零刻线是否磨损。如已磨损应从其他清晰划线量起(2)看刻度尺的量程(测量范围)。原那么上测长度要求一次测量，如果测量范围小于实际长度，势必要移动刻度尺测量假设干次，这样会产生较大的误差。(3)看刻度尺的分度值。分度值反映了刻度尺的准确程度和测量结果的有效性。量程和分度值应从实际测量的要求出发进行选择。2、长度的测量工具刻度尺使用方法：(1)会“选，指刻度尺的选择，不同的刻度尺其精确程度不同，也就是分度值不同。测量对象不同，所需的精确程度也不同。例如：在安装门窗玻璃时进行的测量准确程度要求较高，要选用分度值为1mm 的刻度尺，而测量教室的长和宽时，准确程度要求不高，长度较大，选用分度值是lcm 且量程较大的卷尺较适宜。(2)会“放。如下图.尺要沿着所测的物体，不利用磨损的|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 4 页文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2第 3 页零刻线。所谓沿着，一是指放正不歪斜;二是指要尽可能地贴近被测长度。零刻线磨损的应以其他某一刻线为零点，读数时要注意减去“零点前的数字：(3)会“看。如下图，读数时，视线要与尺面垂直，不要斜视。(4)会“读。精确的测量需要估渎，指在读数时，除准确读出分度值的数字(准确值)外，还要估读到分度值的下一位(估计值)。如 25.38cm 中，25.3cm 是准确值，0.08cm 是估计值，虽然估读的并不准确，但它对我们还是有用的，它表示该物体的长度在 25.3 25.4cm 之间而更接近于25.4cm。(5)会“记。记录测量结果时，除了正确无误地记下所读出的数字外，还要标明单位，只写了数字未标明单位的记录是没有意义的3、选用适宜刻度尺和正确记录数据的方法：长度测量的精确程度是由刻度尺的分度值决定的。所以，根据所要到达的精确度，要选择分度值和量程都适宜的直尺、皮卷尺等刻度尺，如：测量课本的长度，用分度值为1mm、量程为 30cm的塑料直尺即可。用精确度很高的刻度尺去测量一个精确度要求不是很高的物体，如用游标卡尺或螺旋测微器去测量课桌的长度，增加了测量的麻烦，也是不可取的。测量时要尽量选择量程大于所测物体长度的刻度尺，这样可防止屡次测量的累加，提高测量精确度。正确读数和记录数据是做好测量的关键。读数时，应弄清各|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 4 页文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2第 4 页大小刻度值的意义(即标有数字的主刻度的单位及分度值的单位)。如下图，每一大格为1cm，每一小格为1mm。读数时，还要注意被测物体的始端是否与刻度尺的零刻线对齐，假设没有对齐，要将所读数值减去这一刻度的刻度值。小编为大家提供的八年级上册物理期中考第一章知识点就到这里了，愿大家都能在学期努力，丰富自己，锻炼自己。|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 4 页文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2文档编码:CM3H7M8O1E3 HG1D1M5N5G6 ZP8Z4G1J9W2