(完整word版)空气教学设计.pdf

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1、1 第二单元我们周围的空气课题 1 空气教学设计一、教学目标1、知识与技能：了解空气的成分，并了解氧气、氮气、稀有气体的主要物理性质和用途。初步认识纯净物、混合物的概念，能区分混合物和纯净物。对空气的污染和防治有所认识。认识空气是一种宝贵的自然资源。2、过程与方法通过科学实验，引导学生进行观察、记录、分析和讨论实验现象，培养学生良好的学习习惯和学习方法观察和分析演示实验，初步学会描述实验过程和现象的方法。加深对知识的理解。体会实验中的观察、比较、分析和归纳的方法。培养学生收集处理信息的能力及交流表达的能力。3、情感与价值观使学生初步了解空气污染的危害，知道空气是一种宝贵的自然资源，激发学生关注

2、环境、热爱自然的情感。培养学生的环保意识和实事求是的科学态度。培养学生的化学兴趣重点难点 重点：空气中的各种成分。测定空气中氧气含量的实验方法。培养学生对实验现象的观察和兴趣，增强环保意识。难点：测定空气中氧气含量的实验方法。区分混合物和纯净物课时：二课时三、教学设计第一课时：教学目标 了解空气的成分。初步认识纯净物、混合物的概念，能初步区分混合物和纯净物教学重点认识空气中的各种成分。2 测定空气中氧气含量的实验方法。教学难点测定空气中氧气含量的实验方法。初步区分混合物和纯净物培养学生主动观察、分析的能力以及语言表达的完整和准确性。教学方法实验观察法，激发、质疑、解惑法。教学过程：教学内容教师

3、活动学生活动自我点评1、创设情景，导入新课导入：从西双塘优美的环境引出空气。（板书）课题 1 空气师：同学们讲新课之前，哪位同学可以解释这个现象？师演示用滴管吸水，问：水为什么可以吸起来？接着问：吸上来的水的量和排出的空气的体积有没有关系？弄清楚了这个问题，我们来深入研究一下空气。回答：滴管中的空气被排出。思考、回答：吸上来的水的量和排 出的空气的体积相等。通 过 师生对话，营 造 平等、和谐、民主的 课 堂氛围2、指导观察，探究空气的主要成份（板书）一空气的组成1.空气的组成1空气是不是一种单一的气体呢？同学考虑一下？为了搞清楚空气的成分，很多科学家致力于这方面的研究，其中最有名的就是法国化

4、学家拉瓦锡做的实验2 结合课本讲解拉瓦锡的实验。3.演示 实验 2-1 让学生仔细思考、回答：有二氧化碳、水蒸气、氧气等、讨 论 归纳文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N

5、7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3

6、文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4

7、N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B

8、4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4

9、N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2

10、P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N33 观察实验，描述实验现象。完成 实验 2-1 的填表（板书）磷氧气点燃五氧化二磷 设置问题 盛放红磷的集气瓶内，除了水，还有什么

11、？将红磷点燃后放到集气瓶里，见到什么现象？为什么会有这种现象？把止水夹打开后会有什么现象？为什么？想一想集气瓶内原来装入的水有什么作用？为什么点燃的红磷要立即伸入集气瓶中？拉瓦锡通过实验得出氧气占空气总体积1/5，为什么实验中总少于 1/5？红磷燃烧后生成的“大量白 烟”可 以 说“大 量 白雾”吗？若剩余气体主要是氮气，本 回答：空气 发出黄光，冒出大量白烟。红磷燃烧，氧气支持燃烧。倒吸进集气瓶约 1/5，形成负压。答：防止燃着的红磷溅在集气瓶上，将集气瓶炸裂。让白烟溶于水中，同时也起到降温作用。答：防止白烟污染空气。答：红磷熄灭后未冷却到室温，装置漏气；红磷的量不足；有部分水留在导管中未进

12、入集气瓶，燃烧一定程度时，瓶内氧气含量小，红磷不能继续燃烧。答：不能，烟是固体微粒；雾是小液滴以情促景，以景促情文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4

13、N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2

14、P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N

15、6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5

16、G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10

17、C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V

18、5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N34 归纳小结实验还能体现出氮气的什么性质？（板书）氮气（N2）78空氧气（O2）21气稀有气体 0.94 的二氧化碳（CO2）0.03 成其它气体和杂质

19、0.03 分(按体积计算)答：体现出氮气不能燃烧，也不能支持燃烧；不能溶于水。跟随教师总结，笔记，记忆认真思考、理解体会3初步认 识 纯净 物、混 合 物的概念 讲述 像空气这种由多种物质混合而成的物质叫混合物。(不能用具体的化学符号表示)像氧气是一种物质组成，这样的物质叫纯净物。纯净物可以用具体的化学符号表示。如：氧气 O2、氮气 N2、氦气 He、磷 P、五氧化二磷P2O5等。)设疑 你知道日常生活中，身边有哪些纯净物？哪些混合物？矿泉水是纯净物还是混合物？积极思考、讨论日常 生活 中大 多数 是 混 合物。回答：矿泉水是是混合物联系生活4 课堂小结【板书】二纯净物与混合物混合物-由两种或

20、多种物质组成。纯净物-由一种物质组成。、讨论理解5.练后附练一练，课堂练习题目积极思考、回答巩固新知文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码

21、:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3

22、 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7

23、ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档

24、编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2

25、B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N

26、7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N35 一练课堂练习6.课 堂总结学完本课你有哪些收获？积极回答7 课下交流1、能否用其他物质代替红磷来做这个实验？对物质的选择有什么要求？2、你能否想想办法对实验进行

27、改进，尽可能减小误差。知识拓展文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4

28、N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2

29、P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N

30、6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5

31、G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10

32、C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V

33、5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N36 课堂练习1、空气中按体积计算，含量最多的气体是（）A 氧气B 氮气C 二氧化碳D 稀有气体2、在 100 升空气里氧气的体积大约是（）A 78 升B 78%C 21 升D 21%3、空气中氧气与氮气的体积比约为（）A 4：1 B

34、1：4 C 1：5 D 5：1 4、下列物质中属于纯净物的是()A 空气中分离出来的稀有气体B 部分结冰的蒸馏水C 食盐水D 75%的医用酒精5、下列各组物质中，前者属于纯净物、后者属于混合物的是()A氮气蒸馏水B铁矿石食盐水C氢气CaCO3 D二氧化碳空气6、下列的水属于纯净物的是()A 矿泉水B 自来水C 河水D 浮有冰的水想一想在一个具有刻度和可以左右滑动活塞的玻璃容器里放入一粒白磷（足量），将玻璃容器固定好（见下图，固定装置已省略），放在盛有80 水的烧杯上（白磷燃烧所需的最低温度为40）。如图进行实验，试回答：1、实验过程中可观察到的现象是:.2、由此现象得出的结论是：.文档编码:C

35、F10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 H

36、R5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV

37、4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码

38、:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3

39、 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7

40、ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档

41、编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N37 板书设计第二单元我们周围的空气课题 1 空气第一课时一空气的组成1.空气的成分磷氧气点燃五氧化二磷P O2 P2 O5氮气（N2）78氧气（O2）21空气的成分稀有气体 0.94 (按体积计算)二氧化碳（CO2）0.03 其它气体和杂质 0.03 2纯净物与混合物混合物-

42、由两种或多种物质组成。纯净物-由一种物质组成。文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 Z

43、V4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编

44、码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B

45、3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7

46、 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文

47、档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3文档编码:CF10C2P4N2B3 HR5V5N6B4N7 ZV4J3B5G4N3