大象版 四年级下册科学教案

______________________________________________________________________________________________________1、“你曾经……”____________________________________________________________________________________________________________________________________________________________________________________________________________“能借助简单的工具对物体进行较细致的观察，并搜集相关____________________________________________________________________________________________________________________________________________________________________________________________________________），______________________________________________________________________________________________________“空气中的颗粒”与“汽车尾气调查”可以根据实际情况____________________________________________________________________________________________________________________________________________________________________________________________________________等。不同的地区要因地制宜，通过这一单元的学习，给学生一______________________________________________________________________________________________________“记录表”要表现出观察日期、小苗高度、样本序号等项____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________教学时，要求人人参与，初步体验平衡需要条件。游戏一_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________拓展活动,安排了定、动滑轮的优点重新组合。绕绳游戏____________________________________________________________________________________________________________________________________________________________________________________________________________熄灭。做完验证后，出示3号杯，在杯子口垫一枚棋子儿，会应注意1）先让学生大胆猜想各种情况的结果，然后在___________________________________________________子剪一剪2）分组实验前，让学生充分讨论，分工合作等操___________________________________________________然后进一步提出了‘蜡烛燃烧时间的长短还与哪些因素有关”______________________________________________________________________________________________________“灭火器”也许是第一次。借助拓展活动激发学生兴趣，补充“飞上蓝天”这一主题，主要训练同学们综合运用多种途径______________________________________________________________________________________________________解，让学生用各种形式表现出来，比如：文字、图片、模型、“展示会”是科学研究中经常用到的一种表达交流方式，同____________________________________________________________________________________________________________________________________________________________________________________________________________伸，使学生从“侦破”经历中学会科学探究的方法和步骤。______________________________________________________________________________________________________把小组讨论的结果进行整理，分类后摘录要点（一句话）记___________________________________________________