教学目标1.知识与技能(1)感受浮力的存在、并会用测力计测量其大小;(2)知道阿基米德原理.2.过程与方法(1)通过实验探究、认识浸在液体中的物体都受到竖直向上的浮力;(2)经历探究浮力大小的过程.3.情感态度与价值观培养学生自主学习、互助学习的能力;训练提高学生表达和动手操作的能力;让学生在自学、合作学习中体会愉悦;教学重点阿基米德原理的实验探究及应用. Teaching Objectives 1. Knowledge and skills (1) to feel the existence of buoyancy, and will use a dynamometer to measure its size; (2) to know the principle of Archimedes 2. Process and methods (1) through experimental exploration, understanding of immersion The objects in the liquid are buoyancy upwards and upwards; (2) the process of exploring the size of the buoyancy; (3) the emotional attitudes and values ​​cultivate students ’ability to learn independently and help each other; (2) training to improve students’ ability of expressing and hands- In self-study, cooperative learning pleasure; teaching focus of the experimental exploration and application of Archimedes principle.