【案例背景】本节课是一节探究性实验教学的典型课型,按照本节课的教学目标,由学生讨论导入,通过提出问题——做出猜测——设计实验——实验验证——得出结论的方法,切实的体现了本节课的教学目标,培养了学生自主探究科学问题和小组合作的意识,同时培养了学生知道用实验验证,从而达到解决实际问题的目的。为了更好的发挥学生自主探究能力,本节课主要是让学生们自己讨论,用图解说明实验方案,然后教师引导学生,是实验 【Case Background】 This lesson is a typical lesson type of inquiry experiment teaching. According to the teaching goal of this lesson, the students discuss and import, ask questions - make guess - design experiment - experiment verification - The method of conclusion can effectively reflect the teaching objectives of this lesson, cultivate students ’awareness of scientific problems and group cooperation independently, meanwhile cultivate students’ knowledge of using experimental verification to solve practical problems. In order to give full play to the ability of students to explore independently, this lesson is mainly for students to discuss their own, with a graphical illustration of the experimental program, and then teachers guide students is the experiment