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本节课是压强在空气中的表现。大气压是很重要的物理现象,它与生产和生活有着密切的联系。学生在日常生活中经常利用大气压,但对大气压的存在却并不清楚。所以,在授课时,首先可利用液体压强的知识,猜测大气压强的存在。其次,学生的感性认识多于理性,学习的动力和热情大多来自兴趣,所以在教学过程中采取以实验为基础,为探索问题的出发点,充分激发学生的学习热情,通过亲身实践,体验大气压的存在,使抽象的问题变得形象、具体,更易于学生理解和掌握。再次,通过解释生活实例,特别是抽水机的构造和原理,了解大气压在生产和生活中的重要性,强化了学生
This lesson is the performance of pressure in the air. Atmospheric pressure is a very important physical phenomenon, it is closely linked with the production and life. Students often use atmospheric pressure in their daily life, but the existence of atmospheric pressure is not clear. Therefore, when teaching, first of all, we can use the knowledge of liquid pressure to guess the existence of atmospheric pressure. Second, the students 'perceptions are more than rational. Most of the motivation and enthusiasm for learning come from the interest. Therefore, in the process of teaching, they take the experiment as the starting point to explore the issue, fully stimulate students' enthusiasm for learning, experience the atmospheric pressure through personal experience Existence, the abstract problem becomes an image, specific, easier for students to understand and master. Thirdly, understanding the importance of atmospheric pressure in production and life by explaining life examples, especially the structure and principle of the water pump, reinforces the students'