2022年人教版生物七上第三节《生物对环境的适应和影响》word教案一 .pdf

名师精编优秀教案教学设计分析、评价、反思、体会课题第三节 生物对环境的适应和影响教学目标知识与能力一、教学目标1.能够选取多方面的事例来描述生物对环境的适应和影响。2.认同生物的形态结构、生活方式与环境相适应的观点。3.通过分析文字和图片资料来提高学生说明问题的能力及交流合作的能力。4.尝试收集、处理数据的方法。5.学习通过测量进行科学探究的方法。6.了解生物与环境的关系，渗透环保意识。7.树立“生物与环境是一个不可分割的整体”的观点，为下节课生态系统的学习做好铺垫。过程与方法1.描述生物对环境的适应和影响。分析文字和图片资料来提高学生说明问题的能力及交流合作的能力。2.尝试收集、处理数据的方法。3.学习通过测量进行科学探究的方法。情感态度价值观了解生物与环境的关系，渗透环保意识。树立“生物与环境是一个不可分割的整体”的观点。认同生物的形态结构、生活方式与环境相适应的观点。重点 描述生物对环境的适应和影响。在教学中引导学生理解生物体结构和功能相适应的辩证观点。鼓励学生多从生活中发现问题，提出问题，培养学生科学探究精神。名师精编优秀教案难点描述生物对环境的适应和影响。在教学中引导学生理解生物体结构和功能相适应的辩证观点。鼓励学生多从生活中发现问题，提出问题，培养学生科学探究精神。教学策略教法选择探究，发现问题，提出问题学法引导“植物对空气湿度的影响”的探究，要求填好测定数据教具媒体组合应用教师准备一些生活在不同环境中的生物的影像资料。布置“植物对空气湿度的影响”的探究，要求填好测定数据。课程资源开发利用教师活动学生活动学习内容新课引言让学生谈出生物和环境是相互影响的，即生物也能适应环境和影响环境。创设情景，引入新课。教师启发：在讨论了环境因素对生物生活影响的基础上，同学们自然会考虑生物对环境变化会产生什么反应，生物是如何面对环境的变化的，引发学生思考，导出本节新课的内容适应环境，在适应的过程中也影响着环境。生物对环境的适应学生根据图片说出骆驼、骆驼刺、海豹、旗形树形态结构或生活方式的特点与它们的生活环境的关系。教师出示图片，引导学生分析资料，得出生物的形态结构或生活方式是与环境相适应的结论。教师启发学生：哪位同学文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 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ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4名师精编优秀教案学生根据自己的知识储备说出生物与环境相适应的典型实例。表达不准确的地方教师注意纠正补充。让学生了解在自然界各种环境中都广泛分布着生物。让学生初步懂得生物对环境的适应是自然选择的结果。知道不同的生物是怎样适应环境而生活的？让学生了解生物与环境相适应是普遍的。教师播放影像资料。让学生进一步理解生物对环境的适应。在学习了“适应的四个典型实例”和“适应的普遍性”后，在解释时要注意符合“自然选择学说”的原理。探究结果交流学生拿出课下测量、处理的数据，在课堂上进行交流，得出实验结论。组织学生交流探究结果。教师对探究报告给予评价。让学生进一步掌握科学探究的一般方法。生物对环境的影响学生展开讨论：a.蚯蚓的益处？b为什么我国西部开发强调要退耕还林和退耕还草，谈谈这样做的道理。学生举例。学生讨论，进一步理解生物对环境的影响。教师出示教材图片，引导学生讨论分析图片。启发学生举出生物对环境影响的更多例子。抓时机对学生进行环保教育。教师出示影像资料屎克螂滚粪球。技能训练学生提出发现的问题，与同学交流，大家讨论谁提出的问题更有探究价值。教师出示猫、兔的双眼位置的图片，让学生观察并从中发现问题。在完成技能训练的基础上，教师鼓励学生多文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 HK6B10V10F2G10 ZN1O8A2W2H4文档编码:CZ10C6F2V5B3 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