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教学目的1、认识反冲现象 ,了解“反冲”作用在生产、生活及航空航天方面的应用。2、培养学生的观察能力、实验能力和归纳概括的能力。3、介绍我国在研制、发射、回收火箭方面的成就 ,向学生进行爱国主义教育。教学准备1、分组实验材料———气球、饮料罐 (照课文要求加工 )、
Teaching Objectives 1, to understand the phenomenon of recoil, understand the role of “recoil” in the production, life and aerospace applications. 2, develop students' abilities of observation, experiment and generalization. 3. Describe the achievements made by our country in developing, launching and recycling rockets and carry out patriotism education to students. Teaching Preparation 1, grouping experimental materials --- balloons, beverage cans (according to the text request processing),