新的化学课程标准要求教学要紧密联系学生的生活实际,从学生的生活经验和已有知识出发,创设生动有趣的情景,引导学生开展观察,操作、猜想、推理、交流等活动,使学生通过化学活动,掌握基本的化学知识和技能,学会从化学的角度去观察事物、思考问题,激发对化学的学习兴趣以及学好化学的愿望。 The new chemistry curriculum standards require that teaching should be closely linked with the students ’actual life. Based on the students’ life experiences and existing knowledge, students should create vivid and interesting scenes and guide students to observe, manipulate, guess, reason and exchange activities Chemistry activities, mastery of basic chemical knowledge and skills, learning to observe things from a chemical point of view, thinking of questions, stimulating interest in chemistry and the desire to learn chemistry.