Unit5 Understanding ideas课件 2025-2026学年外研版英语八年级下册

该初中英语课件围绕“自然探索中的发现”主题，以琥珀为核心载体，系统呈现其科研价值（如保存生物细节、揭示物种演化）及宾语从句语法知识。课堂导入通过引导学生回忆小学语文《琥珀》知识，对比中英文描述，构建跨学科学习支架，帮助衔接旧知与新知。 其亮点在于融合语言能力与思维品质培养，通过分析琥珀中恐龙尾巴、古代花朵、新蚂蚁物种三个科学发现，结合思维导图活动梳理宾语从句规则，提升学生语言理解与逻辑分析能力。小组琥珀研究项目与写作任务（描述自然探索发现）强化学习能力，教师可借助结构化活动高效教学，学生在实践中深化对自然探索的认知与表达。

Unit 5 Looking into nature 《英语》（新标准）初中修订版 1 Understanding ideas Lead-in 背景提示:琥珀 琥珀是石化的天然植物树脂。琥珀形成时，流动的树脂常将昆虫、植物等生物包裹其中，立体保存生物的外形和细节(如昆虫的复眼结构、翅膀上的纹理等)。 国家中小学课程资源 3 Learning Objectives 1主题目标: 学生能够了解并介绍人类在探索自然过程中取得的发现。 2结果产出:学生写一篇短文，话题为a discovery in nature exploration. 3 评价标准: (1)学生能够介绍该发现的基本信息，如名称、相关人物等。 (2)学生能够描述该发现的独特性或重要意义。 (3)学生能够阐述个人收获或启发。 (4)学生能够尽可能多地使用本板块的核心词汇和学生用书Useful expressions中的表达。 (5)学生能够正确使用宾语从句(that，if，whether). 《英语》（新标准）初中修订版 4 Look and say. 1. What is this? A piece of amber. 2. Is amber about things in the past or things in the future? It is about things in the past. It can tell us how things have changed over time. 国家中小学课程资源 unlock discovery change prove a window on the past key secrets of nature 1.Look at the title and the pictures . What the passage is about? Use the word cloud to help you. 国家中小学课程资源 6 What is the passage about? A. How amber helps scientists unlock the secrets of nature. B. How to make amber and use it in daily life. C. How amber came into being. √ 国家中小学课程资源 Scan and answer. How many secrets are mentioned in the passage? What are they? Three. The secret about the dinosaur The secret about the flower The secret about the ants 国家中小学课程资源 教学提示:调动学生的跨学科知识 学生在小学语文课程中已学习过柏吉尔的《琥珀》一文。在本课教学中，教师可以充分利用这一学习经验。首先，教师可以引导学生回忆他们在语文课上所学的关于琥珀的基本知识，如琥珀的形成过程和外观特征。接着，教师可以鼓励学生将语文课文中对琥珀的描述与本课英文课文中的描写进行对比，引导他们体会琥珀的科研价值。此外，教师还可以引导学生分享他们在其他课程或课外阅读中了解到的关于琥形的知识或故事。通过调动和整合跨学科知识，不仅能帮助学生更全面地理解课文，更能提升英语学习的兴趣和效果。 1 Imagine a dinosaur in an ancient forest. It is running around, looking for its next meal. With an angry cry, it opens its mouth,raises its beautiful feather-covered arms, and... 2 Wait, feathers on a dinosaur? For hundreds of years, people believed that dinosaurs looked like huge lizards. Just look at all those dinosaurs in books, films and TV shows! However, thanks to a piece of amber, scientists now know that this idea is wrong.In the amber from Southeast Asia, they found the tail of a dinosaur - with feathers. About the dinosaur What’s in the amber? Where was it found? What did scientists find through it? What secrets does it tell? A dinosaur tail with feathers. In Southeast Asia. Dinosaurs had feathers. What dinosaurs looked like. Read Paragraphs 1–2 and fill in the form. 国家中小学课程资源 3 These beautiful golden stones quietly keep pieces of the past. They can tell us whether dinosaurs had feathers,but that’s not all. They also help us understand that life on earth has always changed. A piece of amber from Northern Europe,for example, holds a flower.This species no longer grows in this area. But the find proves that it did 35 million years ago. In the future, amber may also help us discover if other species have changed over time. About the flower What’s in the amber? Where was it found? What did scientists find through it? What secrets does it tell? A flower. In Northern Europe. The flower grew there 35 million years ago. Life on earth has always changed. Read Paragraphs 3and fill in the form. 国家中小学课程资源 4 Thanks to amber, more than 300 unknown species have been discovered. In a piece of amber from Africa, scientists found 13 ants. Research shows that they are a completely new species.Scientists used to believe that ants came from the northern half of the earth. The discovery of this African species has changed old beliefs about the history of ants. Who knows whether this piece of amber will tell us more secrets? About the ants What’s in the amber? Where was it found? What did scientists find through it? What secrets does it tell? 13 ants. In Africa. The ants are a completely new species. Ants did not only come from the northern half of the earth; they also lived in Africa. There are many unknown species for us to discover. Read Paragraphs 1–4 and fill in the form. 国家中小学课程资源 5 As a window on the past, amber has been much studied. However, it’s still not fully understood. We should put more effort into research. Then we can use this key to unlock more secrets of nature. Read Paragraph 5 and answer. What does the writer compare amber to? A window on the past and a key to unlock more secrets of nature. Amber shows us what dinosaurs looked like. life on earth has always changed. a window on the past a key to unlock more secrets of nature there are many unknown species for us to discover. 国家中小学课程资源 3.Choose where you are most likely to read this passage. a In a popular science magazine about findings in nature. b In a newspaper report on exhibitions about dinosaurs. c In a sci-fi book about travelling 160 million years into the past. 国家中小学课程资源 18 4.Complete the diagram with the words and expressions from the passage. 1. secrets 2. Thanks to 3. (always) changed 4. 35 million / thirty-five million 5. unknown 6. ant 7. window 8. nature 国家中小学课程资源 1 What do you think of Paragraph 1? Why does the writer begin like this? Think and share. Paragraph 1 is exciting and interesting. The writer begins like this to draw readers’ interest and make them want to read more. 2 What are some other ways for you to learn about nature's secrets? We can learn about nature’s secrets by reading, visiting museums, exploring the outdoors, doing research or doing experiments. 国家中小学课程资源 21 动词 动词 宾语 宾语从句：放在动词后面作宾语的句子 宾语从句 宾语从句 5.Read the sentences from the reading passage and summarise the grammar rules. Now find more sentences with these structures in the reading passage. 国家中小学课程资源 However, thanks to a piece of amber, scientists now know that this idea is wrong. They also help us understand that life on earth has always changed. But the find proves that it did 35 million years ago. In the future, amber may also help us discover if other species have changed over time. Research shows that they are a completely new species. Scientists used to believe that ants came from the northern half of the earth. Who knows whether this piece of amber will tell us more secrets? 表示肯定或陈述内容时，用that引导宾语从句。 表示“是否”这种不确定的概念时，用if或whether引导宾语从句。 Now find more sentences with these structures in the reading passage. 国家中小学课程资源 23 6.Connect the sentences in with that/if/whether . 1. Is there life in outer space? Scientists aren’t sure. _____________________________________________________ 2. “I want to be a scientist and study plants,” John told his parents. _____________________________________________________ _____________________________________________________ 3. Is Mr Brown interested in insects or birds? Emily wants to know. _____________________________________________________ ____________________________________________________ Emily wants to know if/whether Mr Brown is interested in insects or birds. Scientists aren’t sure if/whether there is life in outer space. John told his parents that he wanted to be a scientist and study plants. 国家中小学课程资源 24 7.Complete the messages with that, if or whether. if / whether that if / whether that that if / whether 国家中小学课程资源 8.Work in pairs, and look at the notice and write a short passage about exploring nature.Use the words and expressions from the reading passage and the Useful expressions to help you. 国家中小学课程资源 26 8.Work in pairs, and look at the notice and write a short passage about exploring nature.Use the words and expressions from the reading passage and the Useful expressions to help you. 国家中小学课程资源 27 Useful expressions For hundreds of years, people believed that... ... made an amazing discovery. By..., ... found/realised/saw that... It proves that... It teaches us that... Research shows that... 国家中小学课程资源 28 教学示例 国家中小学课程资源 Grammar 国家中小学课程资源 30 宾语从句(1) 1.定义和构成 宾语从句是英语中用来充当宾语的句子宾语从句一般由“引导词十主语十谓语十其他”构成，语序要用陈述句语序。 2.that引导的宾语从句 that引导的宾语从句用来陈述事实，that本身无词义，在从句中不作任何成分，在口语中常常省略。但是如果有两个并列的宾语从句，第二个从句的引导词that不能省略。 例如: He said (that) the book was veryinteresting and that (不能省 略) all thechildren liked to read it.他说那本书很有趣，所有的小朋友都喜欢看。 (1)主句的谓语动词是表示肯定的概念， believe, expect, explain, feel, forget,guess, hear, hope,imagine, know, prefer,promise, remember, report, say, see, tell,think,understand,warn,wish 等时,其后面的宾语从句一般用that引导。 例如: I hope (that) he will be fine soon. 我希望他很快好起来。 He said (that) he didn't like music. 说他不喜欢音乐。 (2)主句由“连系动词十形容词”构成的“系表”结构，常接that引导的宾语从句。这类形容词多表示感情，如afraid,certain， sure,surprised 等。 例如: glad, happy, pleased, sad, satisfied, sorry, I'm afraid (that) he can't come.恐怕他不能来了。 We are all pleased (that) you can come. 你们能来我们都很高兴。 3.由whether或if引导的宾语从句 whether,if 都意为“是否”，当宾语从句要表达不肯定或疑问的概念时，从句由whether或if来引导,不能用that。whether 和if在从句中不可省略。 例如: I don' t know whether/if he will help me.我不知道他是否会帮助我。 【注意】一般情况下,if和 whether 可以互换，但以下3种情况只能用whether: (1)在不定式之前。 例如: We don’t decide whether to go toBeijing or not.我们还没决定是否去北京。 (2)在介词之后。 例如: It depends on whether you want to do it. 这取决于你是否想去做这件事。 (3)与or not连用表示选择意义时。 例如: They are talking about whether to buy acar or not. 他们正在讨论是否买一辆小汽车。 针对训练 用 that, if, whether 填空。 (1)I think he will come back soon. (2) She wonders the movie is interesting. (3)The teacher said the earth goes around the sun. that if/whether that You mind map should cover the functions of conjunctions and structures. Draw a grammar mind map of object clauses in groups. 国家中小学课程资源 35 1. Finish the reflection on the learning sheet. (Required) 2. Work in groups to carry out the “Amber Research Project”. The group members need to collect information related to amber ( such as more amber research cases, characteristics of amber from different regions), and then make posters. (Required) 3. Write a short essay titled “If I found a special piece of amber”, describing what’s inside the amber and its value for research. (Optional) Homework 国家中小学课程资源 36 Thank you ! 国家中小学课程资源 37 Blues 170880.0 $