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一、教学目的1.向学生介绍—些有关水在自然界的分布情况和水与人类的关系的常识,使学生了解水的重要性。2.使学生初步了解水污染的严重后果和防治水污染的重要意义,培养学生节约用水的好习惯,增强环保意识和法律意识。二、教学重点节约用水和防治水污染三、教具准备小黑板、一杯污水、一杯蒸馏水、自然风光图片四、教学方法启发、讨论五、教学过程1、投影P44章头图,引入第三章,过渡到本节
First, the purpose of teaching 1. Introduce to students - some knowledge about the distribution of water in the natural world and the relationship between water and humans, so that students understand the importance of water. 2. Enable students to have a preliminary understanding of the serious consequences of water pollution and the importance of preventing and controlling water pollution, to cultivate students’ good habits of water conservation, and to increase awareness of environmental protection and legal awareness. Second, the teaching focuses on saving water and preventing water pollution. 3. Teaching aids for preparing small blackboards, a cup of sewage, a glass of distilled water, and natural scenery. Picture 4. Teaching methods for inspiration and discussion 5. Teaching process 1. Projection P44 Chapter head image, introduction of the third chapter, Transition to this section