2022年人教版化学九年级上册第一单元课题2《化学是一门以实验为基础的科学》word教案1 .pdf

名师精编优秀教案蒙 阴 四 中 九 年 级化学教案编号 03 课题 2 化学是一门以实验为基础的科学课型新授课主备人（首次 备 课 时间）宋炳强2014.9.6 教学目标1、认识学习化学的一个重要途径是实验，初步学会对实验现象进行观察和描述的方法，初步学习书写探究活动（或实验）报告的方法。2、能体验到探究活动的乐趣和学习成功的喜悦，并进而体会到化学学习的特点是关注物质的性质、变化、变化过程及其现象。教学重点培养学生对实验现象的观察和分析能力，并能明确地表述探究所得到的结论。教学难点激发学生探究的情趣。教材分析与教法设想本课题首先指出，源于生产和生活实践的化学历来重视实验。随后，通过安排“对蜡烛及其燃烧的探究”、“对人体呼出的气体和人体吸入的空气”两个探究活动。教学准备教师准备：烧杯、澄清的石灰水、火柴、蜡烛、水等。学生准备：蜡烛、火柴教学环节导学过程学习过程备注创设情境引入：观察是一种重要的学习方法，学会观察化学实验现象，在化学科学中具有重要作用。一般来说，我们可以利用人体感觉器官一视、听、嗅、触来进行观察体验。下面我们对蜡烛及其燃烧的探究来学习科学探究的方法。实验探究：点燃蜡烛“前”教师引导学生根据已有的物学生观察蜡烛的结构、颜色、状态、形状和硬度等，并嗅其气味，用小刀切一小块石自名师精编优秀教案主学习理知识进行开放性的探究点燃蜡烛“中”教师巡回指导教师演示：从蜡烛火焰中，可以引出一缕白烟熄灭蜡烛“后”教师指蜡放入水里看是否沉入水底学生观察燃烧过程1、取一根火柴梗迅速平放入火焰中，1s后取出，观察火柴梗燃烧的情况。2、取一只干冷烧杯罩在火焰上方，观察烧杯壁的现象，取下烧杯，迅速倒入小量澄清合作共建知能应用巩固文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 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ZP3Z8U9P7Z7名师精编优秀教案同学们参考。学生自己设计完成实验报告。课后作业（弹性）：1、同学们有兴趣的话，可围绕今天的探究实践，写一篇关于蜡烛的习作。体裁不限：综合报告、科技小论文、科普小小说、科幻故事题目自拟：如“蜡烛自述”、“烛光探秘”、“小小蜡烛知多少”2、可尝试将自己的习作向有关报刊投稿，投稿地址可向老师咨询。学生观察发生的现象。学生合作去点燃刚熄灭时的白烟，看能否燃烧。分析、交流及得出结论：蜡烛熄灭后有白烟产生白烟能燃烧交流汇报探究过程及结果各小组交流实验结果及体验学生 1、对图1-17 操作的改进。1 用冷、干燥的玻片，在火焰外不同距离文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 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ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7名师精编优秀教案可观察到不同的现象。2用石灰水润湿烧杯内壁。如图 1-17 罩在火焰上方2、对用火柴梗实验的异议。改用洗净干燥的“雪糕”木片削成细木条来代替火柴梗。文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 ZP3Z8U9P7Z7文档编码:CC10G2J1C4B8 HB7V8W5C5M3 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