当前位置:首页>教案>八年级下册:第8课《时间的脚印》教案、教学设计、教学反思,可下载

八年级下册:第8课《时间的脚印》教案、教学设计、教学反思,可下载

  • 2026-04-25 05:33:49
八年级下册:第8课《时间的脚印》教案、教学设计、教学反思,可下载

语文全册教案、教学设计

8  时间的脚印

1.激发探索大自然的兴趣,培养理性思考、自主探究的习惯。(文化自信、思维能力、审美创造)

2.通过对文本的学习,解析岩石记录时间的“奇异功能”,把握文章说明顺序。(思维能力)

3.感受文章生动形象的说明语言。(语言运用)

1.把握文章的说明顺序,培养理性思考、自主探究的习惯。

2.品味文章精练有趣、准确严谨的语言和生动形象的描写。

同学们,我们“时空侦探社”正在招募一批能够解读“时间密码”的小侦探!最近社里接到 一个特殊案件:大自然中的岩石、树木、冰川等目击者都声称自己身上留有“时间的脚印”,但我 们需要专业侦探来解读这些证据。通过考核的同学将获得“时间侦探”资格证书!下面我们就 一起走进大自然,去侦察这些“时间的脚印”。

学习任务一:“侦探培训营” ——知识储备环节

教师活动 学生活动

【引导】请新晋侦探们快速 浏览这篇课文(“岩石证词档

案”),回答下列问题。

【提问1】请快速浏览课文, 梳理出文章的档案结构(段落层  次),并简要阐述每个层次的核   心内容。

【提问2】结合梳理出的文  章段落层次及各层次核心内容, 分析本文采用的说明顺序,并说 明该说明顺序在文中是如何体  现的。 【回答1】第一部分(第1—4段):首先提出“时间”的话 题,由生活时间到地质时间,引出本文的话题——岩石是

大自然记录时间的重要方式之一。

第二部分(第5—29段):是文章的主体部分,具体说 明岩石是如何记录时间的。

第三部分(第30—31段):是文章结尾,总结读懂岩石 记录对人类研究地球历史、开发资源等的意义。

【回答2】文章从岩石可以记录时间写到岩石怎样记录 时间,最后写读懂岩石记录时间的意义,根据事物的内在

联系,由浅入深、层层递进地说明,属于由概括到具体的逻 辑顺序。

学习任务二:“案件现场勘查”——文本精读环节

教师活动 学生活动

【提问1】岩石 通过哪些特征指认  时间?

【提问2】请阅 读课文第22—29段并分组讨论,说说岩石保存了哪些历史痕迹,它对人类有着怎样的意义,你从中得到了哪些启示。 【回答1】①不同年代沉积形成的岩石层像“书页” 一样层层堆叠。

②保存在岩石中的古生物遗体或自然痕迹。

【回答2】历史痕迹:①记录了地壳的活动;②记录了气候的变化; ③记录了古代生物的状况;④记录了地球历史的发展过程;⑤记录了

自然界某些转瞬即逝的活动。

意义与启示:对岩石的研究,不仅使我们增长了知识,对自然界与 史前历史有了更多的认识,还使我们拥有了开发史前资源的可能性,

能为人类谋取幸福。我们要秉承这种科学观念,发扬科学探索的精 神,在人类前行的历史上,贡献出一分力量。

学习任务三:“证据整理分析”——品读语言环节

教师活动 学生活动

【提问1】文中有很 多语句具有形象、幽默  和准确的特点。你能找  出几句分析一下吗?

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  1. CONNECT:[ UseTime:0.000395s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000525s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000483s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001510s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000615s ]
  6. SELECT * FROM `set` [ RunTime:0.001426s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000725s ]
  8. SELECT * FROM `article` WHERE `id` = 479766 LIMIT 1 [ RunTime:0.001777s ]
  9. UPDATE `article` SET `lasttime` = 1777689156 WHERE `id` = 479766 [ RunTime:0.004593s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000339s ]
  11. SELECT * FROM `article` WHERE `id` < 479766 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000491s ]
  12. SELECT * FROM `article` WHERE `id` > 479766 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001306s ]
  13. SELECT * FROM `article` WHERE `id` < 479766 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000855s ]
  14. SELECT * FROM `article` WHERE `id` < 479766 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004729s ]
  15. SELECT * FROM `article` WHERE `id` < 479766 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002469s ]
0.099432s