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化学实验不仅能激发学生学习兴趣,还能促进学生对知识的理解。化学实验能帮助学生形成概念、理解原理;实验中运用对比的方法能让学生能更好、更深刻地理解概念和原理的本质,促使学生把所学知识运用到实际生活中去,并对化学产生浓厚的兴趣。每年教学《燃烧和灭火》(人教版《化学》九年级上册教材第七单元课题1)后,学生对课题后的“练习与应用”的习题1、2(教材第135页)的解答总是出现误解:误认为消防员用高压水枪灭火
Chemistry experiments can not only stimulate students ’interest in learning, but also promote students’ understanding of knowledge. Chemistry experiments can help students to form concepts and understand the principles; using comparative methods in the experiment can enable students to understand better the concepts and principles of the essence, to promote students to apply their knowledge to real life, and to chemistry Have a strong interest. After teaching “Combustion and Fire Extinguishing” each year (PEP 9, Year 9, Textbook Unit 7, Task 1), the students’ questions about “Exercises and Applications” The answer is always misunderstood: mistakenly believe that firefighters use high-pressure water cannons to extinguish the fire