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爱护水资源 教学设计

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爱护水资源 教学设计爱护水资源 教学设计 雁楠中学:梁霞 一、教学目标 1、知识与技能: (1)了解世界和我国的水资源状况; (2)了解水污染问题,形成节水和爱护水资源的意识。 2、过程与方法: 通过调查、研究与收集资料,让学生了解水资源状况,学会用辨证的方法来看问题。形成节水和爱水意识。 3、情感、态度与价值观: (1)学习用辨证的观点看待水资源的丰富与有限; (2)增强学生的节水意识; (3)培养学生关心社会、为社会做贡献的社会责任感。 二、教学资源分析 本课题主要介绍两部分内容;一是水资源状况:一方面从储量...

爱护水资源 教学设计
爱护水资源 教学设计 雁楠中学:梁霞 一、教学目标 1、知识与技能: (1)了解世界和我国的水资源状况; (2)了解水污染问 快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题 ,形成节水和爱护水资源的意识。 2、过程与 方法 快递客服问题件处理详细方法山木方法pdf计算方法pdf华与华方法下载八字理论方法下载 : 通过调查、研究与收集资料,让学生了解水资源状况,学会用辨证的方法来看问题。形成节水和爱水意识。 3、情感、态度与价值观: (1)学习用辨证的观点看待水资源的丰富与有限; (2)增强学生的节水意识; (3)培养学生关心社会、为社会做贡献的社会责任感。 二、教学资源分析 本课题主要介绍两部分内容;一是水资源状况:一方面从储量上说明水的丰富,另一方面从可直接利用的淡水量上说明水的短缺。从一个事物的正反两面来认识事物的方法,不仅有利于学生对水资源状况有一个全面、正确的认识,而且有利于培养学生辨证思维的能力,学习用发展的眼光看问题;二是水资源的保护:从节水和防治水污染两个角度介绍。这部分内容注重情感、态度与价值观的体现,培养学生节水、爱水的意识俄及关心社会、为社会做贡献的社会责任感。 三、教学策略分析 1、本课题主要侧重于情感、态度与价值观的教学,因此,在教学过程中,应让学生亲自去体验,了解本地水资源情况,学会用辨证的方法看待水资源。并配合收集的资料、图片,加深印象; 2、在爱护水资源的内容中,以学生调查为主,收集有关水污染的资料、图片、漫画以及污水样品,然后经讨论、分析得出有关水污染的原因以及如何防治; 3、综合上述两点,让学生形成节水意识,并在家庭用水调查的基础上培养学生的节水意识。 4、本节课的教学形式可多样化,从课堂延伸到课外。可组织学生出墙报、写论文、演讲等,充分调动学生的积极性,培养学生关心社会,为社会作贡献的社会责任感。 四、教学重、难点 advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 让学生了解世界和我国的水资源状况,学会用辨证的方法看问题,增强节水意识,培养学生的社会责任感。 1. 教学重、难点:重点:水的组成。 难点:对单质化合物概念的理解。 2.教学准备 (1)组织学生收集资料,进行社会调查; (2)制作水体污染来源示意图的多媒体课件; (3)从网上下载节水标记和水污染漫画等图片。 ? 课时建议:1课时。 五、教学过程 教学教师活动 学生活动 设计意图 流程 创设 (设问) 情境 假如你们想到沙漠中去探险,学生思考回答。 发挥想象,创 你们最需要带什么?为什么? 设情境,营造 氛围。 (过渡) 出示沙漠中,水资源尤其显得可观看图片,对水通过直观教资 贵。那么,其他地方呢?整个资源形 具,产生感性料了世界上的水资源又如何呢? 成初步印象。 认识。 解 通过这些图片,你们了解 资源 到了什么?该用怎样的一句话学生发言:水的 来概括水水资源?(过渡) 储量是 那淡水资源又如何? 丰富的。 通过这几个方 (多媒体出示图片) 面的对比、分 1、全球海水、陆地水的储量 析,让学生学 比。 学生总结需要用会运用对 哪些地方要用到水,你一天要到水的各个方比的学习方 用多少水, 面。 法,培养学生 (学生实验,提供烧杯,水槽 用辨证的观点 等,让学生大致了解一下每天 来看问题。 的用水量) 通过调查研 2、世界人均水量和一些国家观看图表,分析究,让学生走 的人均水量。我国各地区的人对比。 出课堂,培养 均水量。 学生的实践探 (组织汇报) 小组讨论、汇究能力和关心advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 同学们对本地区的水资源已经总,代表 社会的意识。 作了调查,现请各小组讨论汇上讲台发言。 总你们的调查结果。 (附:调查表。) (小结) 水资源紧缺的因素:一方面人 类生活、生产的用水量不断增 加;另一方面未经处理的废 水、废物和生活污水的任意排 放及农药、化肥的不合理施 用。 (过渡) 从 从上面的事实可以看出,水资学生讨论、回 源的储量是丰富的,但可利用答。 我 的淡水资源是紧缺的。甚至许我们要爱护水资 多地区因水资源短缺影响了人源,节约用水,让学生体验分做 们的生活,制约了经济的发防止污染。 析问题、提出 展。 解决问题的方起 (设问)我们该以何种态度来看案的过程。 待水资源呢? 教学教师活动 学生活动 设计意图 流程 (引导分析) 我们要节约用水。那么,你们 节 做到了吗? 学生对照表格自培养学生从我 请讨论“家庭用水情况调查项评,讨 做起的节水意约 目表”。(教材P62表2) 论什么地方做得识。 (出示) 不够, 用 节水标记:我们要节约每滴如何改进。 水。 水 (过渡) 我们虽然注意到了节水问题,小组讨论、交流 调 但由于种种原因,导致了水源调查的情况。代又一次的社会查 污染日益严重。让我们来关注表发言:水污染调查,让学生研 我们身边的水污染情况。 的原因: 从课堂走向社advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 究 (调查与研究) 1、工业三废的任会,从生活中 请同学讨论、交流调查结果。 意排放; 挖掘化学问关 讨论:你们有什么意见或建2、农业化肥的任题,培养学生心 议? 意施用; 关心社会、为污 附:水污染调查报告。 3、生活污水的任社会作贡献的染 (出示课件、图片) 意排放。 责任感。 水体污染来源的示意图; 观图,思考污染 的严重后果。 (小结) 通过本课题的学习,你们知道 通过小结,让总 了什么? 学生整理知结 结束语:为了使我们周围的水 识,再次让学提 更清,让我们爱护水资源! 学生小结,形成生体会化学与高 (作业) 共识。 生活的联系, 1、以墙报的形式,把你们的 培养学生运用培 调查结果展示给全校的师生; 准备课后的作化学知识解决养 2、将你们对有关水的问题的业。 实际问题的能能 思考、想法写成一篇小论文。 力。 力 ? 板书设计: 课题4 爱护水资源 一、人类拥有的水资源 1、水资源概况:全球——世界各国——中国——江苏——本地; 2、结论:水资源的储量是丰富的,但淡水资源是紧缺的。 二、爱护水资源 1、节约用水:节水标记。 2、防治水污染: 污染的原因:?工业上“三废”的任意排放; ?农业上农药、化肥的任意施用; ?生活污水的任意排放。 advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 水的净化教学设计 雁楠中学:梁霞 一、教学设计的理论依据 关于水的污染,水的净化对每个学生来说肯定都积累了很多成熟或不成熟的 经验 班主任工作经验交流宣传工作经验交流材料优秀班主任经验交流小学课改经验典型材料房地产总经理管理经验 ,然而说到底,这仍然是对水的污染、水的净化表面特征的认识,但该怎样从化学角度深刻认识它的本质,并且运用它来指导生活实践呢,我认为让每个学生都参与到研究中来,“显隐促成”是教学的基本任务,让学生用已有的认识基础上自己假设,自己动手去探索,就可以将各个学生的原认知显现出来,再通过教师的引导,点拨,告诉,以及师生和学生之间的交流使学生的原认知得以完善和提高。指导思想是“用课本教而不是教课本”先充分体现课堂教学的生活性,通过设计小实验。设计问题引导学生在满足好奇心的愿望中完全地参与问题的研究。 二、教材分析 本课题围绕水的净化问题,将吸附、沉淀、过滤,和蒸馏等净化水的方法有序地串联起来,还加进硬水与软水的区别、硬水软化的方法等内容。因此本课题实验内容丰富,而且贴近学生生活,这为创设情境,引导学生进行自主合作活动提供了很好的素材。 三、教学目标 1、知识与技能: (1)了解纯水自然硬水与软水的区别; (2)了解吸附、沉淀、过滤和蒸馏等净水方法。 2、过和与方法 (1)学习运用实验和观察等方法得到信息,能用文字、化学语言表述有关信息; (2)学习运用比较、归纳、总结等方法对获取的信息进行加工。 3、情感态度价值观: (1)把学到的知识用以解决生活中一些问题,缩短理论与实践之间的距离; (2)保持对生活中化学现象的好奇心和探究欲,发展学习化学的兴趣; (3)逐步树立珍惜资源、爱护环境、合理使用化学物质的观念。 四、教学重点 1、水净化的方法; advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 2、过滤的操作方法; 3、纯水与自然水、硬水与软水的区别以用硬水软化的方法。 五、教学难点 1、培养学生实验的能力; 2、引导学生正确做好实验。 六、教学准备 1、仪器药品:明矾、滤纸、铁架台(带铁圈)、漏斗、烧杯、玻璃棒、肥皂水、浑浊水、井水和纯净水。 2、教学仪器:多媒体、课件 七、教学过程 教师活动 学生活动 设计意图 回顾:水有哪些物理性质,观齐答水的物理复习旧察一下讲台上的两瓶水有什么不性质。 课,利用提同, 回答:一瓶浑浊,问,激发学 同学们想不想知道如何能把浑一瓶澄清透明。 生的学习兴浊的污水变成澄清透明的水啊,引 趣,引入新入新课:自然界中的水大多是混合 课, 物,那么如何把水库和河流中的水 净化为我们家里的自来水, 听讲、思考。 [投影讲解]自来水厂净化过程,重观看投影,并记加深学点讲解明矾的净水原理和活性炭的录。 生对自来水吸附作用。 厂净化水的 知识,引入 水的过滤的 实验。培养 [投影] 学生的社会沉淀:除去不溶性杂质。 责任感。 过滤:除去不溶性杂质。 吸附:既能除去不溶杂质,也能除 去可溶性杂质。 取水 ? 沉淀? 过滤 ? 吸附 ? 消毒? 配水 [过渡]下面就让我们感受一下如何 把浑浊的水变得澄清透 明。 观察,先讨 培养学生【演示过滤实验】由于这个实验是论,在教师的提示的总结能advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 大家新认识的一个综合性操作实下概括出“一贴二力、合作能验,请同学们先观察老师做一遍。 低三靠”的操作步力和动手能 提问:请同学们结合教师的操骤。第一次使用是力,增强学作看教材中的实验图,概括教师的引流;第二次是搅生学习化学操作步骤以及玻璃棒使用的几种作拌;第三次是防止的兴趣。 用。投影“一贴二低三靠”的具体液体飞溅。学生分内容。布置学生分组进行过滤实组进行过滤实验。 验。 提问:现在很多家庭中用的饮看书P56图3 水机中就有净化水的装置,,哪位同—18,自由回答。 学仔细观察过净水装置, 拓展提问:我们在野外野炊时,没思考,讨论, 培养学生有清水了,只有浑浊水,我们怎样回答:可用空饮料的创新思维把这些浑浊水变成清水呢, 瓶、小卵石、沙、和想象力。 棉花等自制净水装 置。 提问:水壶经常盛开水为什么 会产生水垢, [解释]水壶或盛水的器具上结水思索,看书齐 垢,说明水厂净化后的水(自来回答。 水)中含有可溶性物质,不是纯 水。水垢产生的原因是该地区的水 中溶有较多的可溶性钙和镁的化合 物,在水加热或长久放置时,这些 化合物生成沉淀(水垢)。提问: 1、什么叫硬水,2、什么叫软 水,。 [过渡]水有软硬之分,我们如观察演示实培养学何通过实验加以区分呢, 验,讨论,回答:生观察能力【演示实验】用肥皂水可以区分软井水中的泡沫少,和判断能水和硬水。提问:实验现象是什纯净水中泡沫多。力。 么,通过现象我们可以得到什么结总结:肥皂水可以 论, 区分软水和硬水。 思考,回答:学会利 小结:硬水与软水的区别:硬浪费洗涤剂;浪费用化学知识advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 水含钙、镁化合物,他们可溶,用燃料;使一些器具解决生活问肉眼难以分别。可用加热和肥皂水节水垢;造成安全题,树立安来区分。提问:硬水有什么危害, 事故等。 全意识。 [解释]硬水有很大危害,如果观看,蒸馏实 培养学我们除区硬水中钙和镁的化合物,验操作。 生的合作精就可以使硬水转化为软水。生活中 神。 一般通过煮沸水降低水的硬度。工 业上常用离子交换法和药剂法来得 到软水,实验室中通常用蒸馏的方 法来降低水的硬度。投影如下两幅 图并介绍装置仪器名称和操作过 程。 小结本节课内容,并要求课后齐答。 巩固本节完成课本家庭小实验。 知识。 八、板书设计:课题3 水的净化 1、水的净化方法:吸附、沉淀、过滤和蒸馏。 2、过滤的要决:“一贴二低三靠” 。 3、硬水: 4、软水: 5、硬水和软水区别方法: 6、硬水的危害: 7、常用的硬水软化方法:煮沸和蒸馏。 advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 课题3水的组成教学设计 雁楠中学:梁霞 一、教材分析 本课题是人教版义务教育教科书第四单元自然界的水课题3,本课题分两个课时,第一课时通过水的组成学习,使学生在物质的认识上由宏观转向微观,从组成转向结构;第二课时在水的组成的基础上提出单质、化合物、氧化物的概念,使学生对物质的分类有更明确的认识; 本课时以人类认识水的组成的简要史实引入并分水的生成和水的分解两步展开。首先介绍了氢气及其相关的性质,这既是后续学习的基础,也是研究水的组成研究的开端,然后通过水的电解探究实验和对实验现象的讨论和分析介绍了水的组成,说明水是由氢、氧两种元素组成的。 二、学情分析 通过小学科学和中学物理的学习以及生活中经验的积累,学生对水有一定的了解。但怎样以化学的眼光认识水,学生是陌生和不习惯的。好在学生已经掌握了氧气和元素的有关知识,具备了判断化学变化、氧气的鉴别、化学反应文字表达式的书写等技能,这些都有利于本节内容的展开。 三、基于以上学情特点,我结合教材实际和课标要求,确定本节教学目标如下:,.教学目标(1)知识与技能目标 ?知道氢气的性质,能说出检验氢气及验纯的方法; ?认识水的组成,能明确说出水由氢元素和氧元素组成; (2)过程与方法目标 ?结合资料,从探究水的组成过程中体会科学探究的思维方法,认识科学探究的重要性 ; ?充分利用讨论,培养学生观察、分析、归纳、合作学习的能力和习惯 (3)情感、态度与价值观:了解人类认识物质世界的过程和方法,培养学生科学探究的精神。 ,(教学重点:电解水的实验现象 难点:根据电解水的实验现象分析确定水的组成 四、教法、学法分析 (一)教法分析 advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 新课标注重发挥学生的主体作用和教师的主导作用,使之相互促进,协调发展。因此,我采取如下教学方法: 1(探究式实验教学法:结合教材内容特点,本节课采用的教学模式是:设疑—观察— 思考—讨论总结—应用;引导学生动手实验,体验实验的过程,感受实验的乐趣。教给学生通过实验观察、探究得出科学结论的学习方法。 2(互动式教学法:在教学过程中,师生之间不停地进行“信息”交流。使教师的主导作用和学生的主体地位相统一,充分调动学生的学习积极性和主动性; 3(多媒体辅助教学法:把信息技术与学科教学有机结合,利用多媒体增大课堂容量,把抽象的问题变得直观激发学生兴趣。 (二)学法分析:根据本课题的特点,在上述教法的执教的的过程中,培养学生自主学习,小组讨论、实验探究等学法的掌握。使学生“学有所思”“思有所得”,“练有所获”。 五、教学过程 (一)创设情景、温故导新(大约5分钟) 【提出问题】同学们,先和我做一个猜谜游戏 谜题1 :“风华正茂十六春,无色无味气犹存,动物缺它生命止,燃烧离它火难生” 谜题2:“自然界中它最轻,平时分身藏水中,能使气球飞上天,可作燃料供热能” 谜题3:不洗倒干净,洗了不干净。不洗有人吃,洗了没人吃。 【追问】 大家知道怎么区别氧气和氢气吗,水是有什么组成的,(稍作停顿)为解决这个问题,我们就来共同学习本节内容。导入新课 (二)活动探究、探索新知 物质的区分是建立在性质差异之上的,要想区别氧气和氢气,就必须知道他们在性质上有何差异,前面我们已经对氧气的性质的进行了学习,氢气有何性质呢, <一>氢气的性质:本环节我采用:带问题阅读—演示巩固—多媒体强化的模式,让学生知道氢气的化学性质和检验方法(大约15分钟) 带着下列问题让学生阅读P79课文第三段,小组讨论归纳 (1) 氢气有哪些物理性质, 氢气是无色、无臭、难溶于水的气体,密度比空气小。 (2)氢气的重要化学性质是什么, 氢气具有可燃性,点燃不纯的氢气时有可能发生爆炸。 advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts (3)怎样检验氢气的纯度, 先收集一试管氢气,用拇指堵住试管口,管口向下点火,听爆鸣声。 在上述问题探讨的基础上,演示下列两个实验。 【演示实验1】 用向下排空气法收集一试管氢气,检验氢气的纯度 (做两组,一次是不纯的氢气,一次是纯净的氢气) 如果发出尖锐的爆鸣声,表明氢气不纯,增加用一小的AD钙奶的塑料瓶收集不纯的氢气点燃,发生爆炸的实验.然后再收集氢气点燃,如果声音很小则表明氢气较纯。 【演示实验2】改用金属导管点燃纯净的氢气,并检验生成物: (1)在带尖嘴的导管口点燃纯净的氢气,观察火焰的颜色。 (2)在火焰上方罩一个冷而干燥的烧杯,过一会儿,观察烧杯壁上有什么现象发生。 (观察):氢气燃烧有什么现象 (问题)氢气如何检验呢? 用燃着的木条点燃燃烧,产生淡蓝色火焰,有水雾生成(巩固) 用多媒体动画强化记忆、巩固提高。 <二>探究水的组成 我通过:问题提出------收集资料------实验探究-------讨论归纳的模式让学生自己动手完成电解水的实验,得出水的组成。(大约20分钟) 1、提出问题: 水是由什么组成的呢, 2、提供资料:如何来证明一种物质是由不同种元素组成的,可以把该物质分解,通过证明产物的方法来判断。 如:,氧化汞加热分解生成汞和氧气,汞和氧气分别有汞元素和氧元素组成,根据反应前后元素种类不变,可知:氧化汞由汞元素和氧元素组成。 3、探究实验 学生自己做电解水的实验, 4、讨论归纳: 讨论 ?上述实验中水是否发生了分解反应,生成几种新物质, ?根据实验结论,结合提供资料,你能得出水的组成吗, 结论: 1、电解水发生了分解反应,生成了氢气和氧气; 2、水的组成:水是由氢元素和氧元素组成的化合物; advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 在学生归纳的基础上,利用多媒体动画强调电解水实验过程及现象,并用多媒体展示电解水的微观过程。在此基础上点出化学变化的实质是分子分解为原子,原子重新结合生成新分子。 设计意图 此环节的目的是使学生对所学知识进行思考,而不是教师直接灌输,激发学生探究新知的渴望和积极性,体现了“以生为本”的新课程理念。在学生自主探究过程中达到知识目标2的掌握和教学重点突破。 <三>练习反馈,巩固新知(3分钟) 设计目的:通过富有启发性的练习,可以 检测 工程第三方检测合同工程防雷检测合同植筋拉拔检测方案传感器技术课后答案检测机构通用要求培训 学生对本节课知识的掌握情况,了解教学目标是否达成,更好地实现有效教学。 <四>交流讨论,归纳小结(2分钟) 在以上学习中,你们能不能用自己的语言来概括表达——以“我从中得到了什么”,比比看哪一组说的最充分最完美。 归纳学生概括表达:1.氢气的性质及检验方法2.水是由氢元素和氧元素组成的。 〈五〉作业布置 1(必做题:课本82页习题 2(选做题:(1)实验室若用电解水制氢气,你觉得合适吗,若要获得大量的氢气,电解水是最佳的方法吗, (2)某同学进行电解水实验时发现:刚开始的时候氧气和氢气的体积比小于1:2,几分钟以后体积比趋于理论值。你知道为什么吗, (3)你能说出以下物质是由几种元素组成的吗? 铁(Fe) 、铜(Cu) 、 氧气(H)、氧气(O)、氮气(N)、磷(P) 、222过氧化氢(HO) 、二氧化碳((CO)、二氧化硫(SO)、水(HO) 、高锰22222酸钾(KMnO) 、四氧化三铁(FeO) 434 六、板书设计:课题三 水的组成 一、氢气的性质: 二、水的组成: 现象:1.电极上有气泡生成; 2.负极产生的气体能燃烧 ,产生淡蓝色火焰 --H2 正极产生的气体能使 燃着的木条燃烧得更旺--O2 3.氢气与氧气的体积比约为2:1 4.结论:(1) (2)水是由氢氧两种元素组成 (3)化学变化中分子分成原子,原子重新组合成新的分子。 advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 教学反思 平行与垂直的教学反思班会课教学反思分数的初步认识教学反思科学我从哪里来教学反思平行与垂直教学反思 雁楠中学:梁霞 年年参加学校组织的骨干教师公开课展示活动,我认为这是一个很好的学习和使自己不断进步的平台,所以每年我都精心准备展示课。今年学校要求我们展示一周的常态课,我认为这更是对我们的信任和更高的要求.虽然是常态课,课堂设计、知识的讲解与平时自己上课的时候没有什么不同,但在具体的导课上和习题设计上自己也是精心准备了一下,由于与自己参加市里的说上课活动时间有些冲突,所以我只上了三节课,在这三节课后我进行了反思,对教学也有了更深的认识,尤其对于如何进一步提高化学课堂教学的有效性,有了更深的理解。 一、此几节课的成功之处: 1、精心设计实验,增强了学生的参与度。如:水净化增设了活性炭吸附的实验,使学生感受到了化学的神奇,调动学生学习的积极性。 2、设置探究问题,拓展了学生的思维空间。 如:水的组成,设计成探究式,引导学生进行探究,逐步渗透。。 3、教学方法得当,教会学生学习 如水的组成一课,我着重于科学探究方法的指导:在教学中,我运用了创设问题情景——提出问题——建立假设——实验探究——得出结论的教学思路和方法。通过猜想探究,结合小组讨论—展示—评价等环节,培养学生灵活运用所学知识解决实际问题的能力,让所有的学生在化学学习中都有不同的收获。 4、教学环节比较清楚,环环相扣,过渡较流畅,有条不紊。如:水的净化分为两个课时,重点突出,通过以往中考习题强化其中的要点,及易错点。 二、不足之处: 1、引课有些粗糙。爱护水资源可以配上音乐效果更好。 2.教师讲解的过多,应充分调动学生的积极性。 3、在课堂上,我觉得还应加大实验力度,让同学们通过实验大胆猜想。例如让学生亲自动手做电解水的实验,是学生理解水的组成。 4、在教学中,还应该化难为易,让学生们热爱化学,懂得如何学习化学。 三、改进的措施: advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts 1、加强自身的理论知识水平学习,提问自己的提问水平和语言描述的准确严谨性。 2、教学中提高探究意识。在备课中做到不仅要备教材、备教法,还要备学法,设计出符合所教班级学情的教案。遇到问题要善于引导学生探究,培养学生设计实验及探究能力。 3、在授课中,一定要善于调动学生的积极性,主动性,培养学生的探究意识,使学生具备一定的透过现象、探究本质的能力,树立科学的态度和世界观。与此同时,这样也帮助教师自己提高积极性和自信心,在教与学中共同成长。 4、我还应该多注重信息交流,主动与一些学校进行交流与学习,扩大资料来源,充分发挥信息互动,取其之长补己之短。 教育工作,是一项常做常新、永无止境的工作。社会在发展,时代在前进,学生的特点和问题也在发生着不断的变化。作为有责任感的。 advantages, facing the Yangtze River Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit and various town streets are developing detailed promotion plans, the basis of what is specific to each industry, has formed a kind of scale, need to bring in the kind of projects each town street has the kind of resources, what location, focus on the development of the kind of industries. Four stroke technology and science. Determinants of technology is the County's economic development through scientific and technological innovation, improve product value-added and improve economic competitiveness, is the inevitable way to achieve leapfrog development. Talent is the city center city's first resource, is the primary industry development, and revitalization of the social protection. So, in terms of skills: to catch ... Competitive. Encouraging enterprises to actively undertake science and technology projects, strengthening research cooperation, using advanced technology to increase the added value of their products to ensure that introduction of transforming scientific and technological achievements during the year ... ... New research enterprises ... ... Home, creating innovative platforms ... ... Generic classifier. In: first, we must strengthen the cultivation of talent, efforts to increase vocational education and training and meet the basic demand of enterprise development. Then introduced a number of the county needed scarce education, health professionals, meet social development needs to invest more in machinery, pharmaceutical manufacturing research and development in higher education, such as the introduction of talent to meet the need. Third, we must rely on ... ... Post-doctoral workstation, ... ... Food research station platform, to the XX University to find experts
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