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教科版八年级物理《7.2力的描述》教学设计1

ID:22862 2014年03月24日 资料纠错 有奖上传 收藏
【内容简介】素质教学目标 1、知识与技能 (1) 知道力的概念和力的单位。(2)知道力的三要素,能用示意图表示力。 2、过程与方法 (1) 通过活动和生活经验感受力的作用效果。(2)了解物体间力的作用是相互的,并能解释有关现象。 3、情感、态度与价值观 (1) 在观察体验过程中,培养学生的科学态度。(2)从力用三要素表示的事例中认识科学方法的价值。 教学重点 1、力的概念和力的单位。 2、力的三要素,用示意图表示力。 教学难点 1、力的概念 2、认识物体间力的作用是相互的,并解释有关现象。 教学过程 一、引 入新课 我们在这一节中要学习一个新的物理概念-------力。力是日常生活和工农业生产中常用的一个概念。也是物理学中一个重要的概念。这一节我们就来探究有关力的一些知识。 二、力的作用效果 物理学中所说的力是什么呢?我们可以通过力的作用效果来感受它。 1、感受力作用的效果 (1)请一位同学到教室前面表演举哑铃。 请这位同学谈谈肌肉有什么感受?(感到手臂上的肌肉十分紧张) 最 初我们对力的认识,就是从肌肉的紧张的感受而得来的。那么,在物理学中我们又是怎样来认识力的? (2)学生用所示的器材做实验。 ........ ? ? ?
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