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八年级下册 Unit 5 Looking into nature 第一课时导学案
课时主题：Starting out & Understanding ideas (Secrets caught in time)
学习目标
了解自然探索相关知识，初识单元主题，知晓李时珍、达尔文、王贞仪等自然探索者的贡献；
掌握 dinosaur, amber, prove, discover 等核心词汇及 thanks to 等短语，能读懂科普文本《Secrets caught in time》；
理解琥珀作为 “时光之窗” 在解锁自然奥秘中的作用，能提取文本关键信息并梳理内容；
思考探索自然奥秘的多种途径，激发对自然探索的兴趣和探究精神。
学习重难点
重点：掌握核心词汇和短语，读懂科普文本，提取琥珀揭示的自然奥秘相关信息；
难点：梳理科普文本结构，理解琥珀的探索价值，用英语表达探索自然的途径。
学习准备：多媒体课件、琥珀相关图片、自然探索者资料卡片
一、课前预习（自主完成）
查阅资料，初步了解下列人物的身份和贡献，用 1-2 句话简单记录（英文 / 中文均可）
Li Shizhen: _______________
Charles Darwin: _______________
Wang Zhenyi: _______________
认读下列词汇，尝试结合音标记忆词义
dinosaur, feather, amber, species, prove, discover, unknown, ant, belief, unlock
思考问题：What do you know about amber What secrets of nature do you want to explore
二、课堂学习
任务一：Starting out—— 激活背景，初识主题（8 分钟）
1. 图片思考
观察单元章首页图片，回答问题：
① What can you see in the picture
② What do you think the man is doing
③ What does the picture make you feel
2. 分层活动
A 层：小组讨论，回答问题：What do you know about Li Shizhen, Charles Darwin and Wang Zhenyi What do they have in common
B/C 层：完成人物与身份、成就的匹配题，再总结三人的共同点。
匹配项：
a. a famous doctor in the Ming Dynasty; wrote Bencao Gangmu
b. a famous British biologist; came up with the theory of evolution
c. a well-known female scientist in the Qing Dynasty; made contributions in maths and astronomy
3. 视频感知
观看自然奥秘相关视频，完成填空 / 表格，回答问题：What secrets of nature are mentioned in the video
① What lives in the _______ parts of the ocean
② Is there _______ among the stars
③ Why do we _______
我的收获
三人的共同特点：____________________
视频中提到的自然奥秘涉及：、、_______领域
任务二：Pre-reading—— 预测文本，铺垫阅读（7 分钟）
1. 图片导入
观察琥珀图片，回答问题：
① What is this golden stone
② What do you think is inside it
③ Is amber about things in the past or things in the future Why
2. 标题与主旨预判
① 理解标题 Secrets caught in time 的含义：____________________
② 阅读文本主旨选项，选择你认为正确的一项，并说明理由：
A. The process of how amber is formed and where in the world it can be found.
B. Amber as a window on the past, which helps us discover and prove the secrets of nature.
C. How to make amber and use it in daily life.
我的选择：_______ 理由：____________________
任务三：While-reading—— 细读文本，提取信息（20 分钟）
1. 略读任务：梳理文本结构
快速阅读文本，回答问题：How many parts can the passage be divided into
将文本分为 3 部分，并匹配每部分的主旨：
Part 1 (Para 1): _______________
Part 2 (Para 2-4): _______________
Part 3 (Para 5): _______________
主旨选项：A. Conclusion & Call to Action B. Introduction C. Three Discoveries from Amber
2. 查读任务：提取细节信息
逐段阅读文本，回答下列问题，在文中划出关键句：
Para 1
① What is the dinosaur doing in the ancient forest
② What does the dinosaur do when it makes an angry cry
Para 2
① What did people think dinosaurs looked like
② What did scientists find in the amber from Southeast Asia
Para 3
① What did scientists find in a piece of amber from Northern Europe
② What does the flower in amber prove
Para 4
① How many unknown species have been discovered thanks to amber
② What did scientists find in a piece of amber from Africa
③ What change did the African ants bring to scientists’ belief
Para 5
① What has amber been described as in the passage
② What should we do to unlock more secrets of nature
3. 文本定位与词汇巩固
① 选择本文最可能的出处：_______
A. a newspaper report on exhibitions about dinosaurs
B. a popular science magazine about findings in nature
C. a sci-fi book about travelling 160 million years into the past
② 用所给词汇补全文本核心内容，每空一词：
secrets, Thanks to, proves, unknown, ants, changed, window
_______ amber, we can unlock many _______ of nature. It is a _______ on the past and it _______ that life on earth has always _______. Amber helps discover over 300 _______ species, such as the new _______ in Africa. It tells us more _______ of nature and we need to study it more.
任务四：Post-reading—— 思考拓展，迁移创新（10 分钟）
1. 文本赏析
小组讨论：
① What do you feel about Paragraph 1
② Why does the writer begin the passage with a description of a dinosaur
2. 迁移思考
结合生活实际，分组讨论并记录：What are some other ways for you to learn about nature's secrets
至少写出 3 种方式：
① ____________________ ② ____________________ ③ ____________________
3. 课堂小结
结合本节课内容，完成句子：
Amber is a key to unlock nature’s secrets because it _______. We can explore nature by _______, and we need to _______ to discover more secrets.
三、课后作业（分层完成）
必做任务（全体完成）
大声朗读课文 3-5 遍，做到发音准确、朗读流畅；
用图表的形式梳理琥珀揭示的三个自然秘密，标注关键信息（如发现地点、发现物、证明的事实）。
选做任务（自主选择）
查阅资料，了解琥珀中发现的其他有趣古生物（如昆虫、植物、小型动物等），用英文写一段50 词左右的科普小报告，介绍其中一种，要求包含：生物名称、发现于哪类琥珀、该发现的意义。
四、学习反思
本节课我掌握的核心词汇 / 短语：____________________
我能梳理出琥珀揭示的_______个自然秘密，还需要加强的部分：____________________
我想到的探索自然的新途径：____________________
我的疑问：____________________

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