Unit 5 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“琥珀揭示自然秘密”核心主题，通过Lead-in问题引导学生思考自然探索方式，结合BBC自然世界视频、Pre-reading词汇讨论搭建学习支架，帮助学生从恐龙化石认知过渡到琥珀科学意义的探究。 其亮点在于融合语言能力、思维品质与学习能力培养，如Fast-reading问题链梳理琥珀中的恐龙、花朵、蚂蚁三大秘密，Detail-reading分析“时光胶囊”暗喻提升思维深度，Retell环节与分层作业强化学习策略。学生能提升语言运用与科学探究能力，教师可借助结构化活动高效开展教学。

Looking into nature 5 Unit Understanding ideas Nature is amazing, wonderful and mysterious There are still many ___________ secrets waiting for us to ________________. unknown unlock /ˌʌnˈnəʊn/adj. 不知道的，未知的 /ʌnˈlɒk/ v. 揭开 Lead -in How can we explore nature? We can study__________________________ to learn about ancient life. dinosaur fossils [ˈfɒslz] /ˈdaɪnəsɔː/ We can also study___________to know some dinosaurs were _______________________. amber feather-covered feather /ˈfeðə/ n. 羽毛，翎 /ˈfeðəˌkʌvəd/ adj. 羽毛覆盖的 /ˈæmbə/ feather-covered. What is amber called by scientists? A window on the past Watch a video about amber What does amber mean to scientists? It can help scientists unlock______________________. It serves as _____________________________ and leads to important___________. It shows how life has ____________ over time. Pre-reading the secrets of nature. a window on the past discoveries changed Use the words and expressions to talk about amber. Look at the title and pictures and predict. What does “ caught in time” mean? What secrets might be caught? Things from long long ago are preserved (保存). Maybe secrets about dinosaurs, ancient animals or plants. Fast- reading The secret about the _________ The secret about the _________ flower ants The secret about the _________ dinosaur Three secrets How many secrets are mentioned? What are they? What questions can you ask for every secret? What’s in the amber? Where was it found? What did scientists find through it? What secrets does amber tell? Whole- reading Read to ask Detail- reading Unlock the Secrets About the dinosaur About the flower About the ants What’s in the amber? A dinosaur tail with __________. A flower. ____ ants. Where was it found? In ________ Asia. In _____________. In ____________. What did scientists find through it? Dinosaurs had ______. The _______ grew there 35 million years ago. The ants are a completely new ______. What secrets does amber tell? ______________________________. Life on earth has always _________. There are many unknown species for us to ______. About the dinosaur What’s in the amber? A dinosaur tail with __________. Where was it found? In _____________ Asia. What did scientists find through it? Dinosaurs had _________. What secrets does amber tell? ____________________________________. Unlock the Secrets feathers Southeast feathers no feather What dinosaurs looked like Unlock the Secrets About the flower What’s in the amber? A flower. Where was it found? In _____________________. What did scientists find through it? The _______ grew there 35 million years ago. What secrets does amber tell? Life on earth has always _________. Northern Europe flower changed Unlock the Secrets About the ants What’s in the amber? ____ ants. Where was it found? In ____________. What did scientists find through it? The ants are a completely new _________. What secrets does amber tell? There are many unknown species for us to __________. 13 Africa discover species Detail- reading What does the writer compare (把...比作) amber to? a window a key Metaphor暗喻 What else can we compare amber to? A time capsule （胶囊）. A bridge. = Look through to see outside = Look through to see ________ the past = unlock a door = unlock _____________________ more secrets of nature figure of speech? 修辞手法 The writer compares amber to __________ and ________. Complete the diagram with the words and expressions from the passage. 1. secrets 2. Thanks to 3. (always) changed 5. unknown 7. window 6. ant Retell the passage First Second Third We should put more effort into research. 4. 35 million Post- reading A. Narrative(记叙文). B. Expository(说明文). C. Argumentative(议论文). What’s the genre of the passage? Post- reading Where are you 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. sci-fi book科幻书籍 Think and share Why does the writer begin like this? To make the text alive and get readers' attention. How does the writer start the passage? A. By listing number. B. By asking questions. C. By creating a situation. The writer says “ We should put more effort into research.” Do you agree? Why or why not? Yes, because there is still much we don’t know. And we need to understand nature better to protect it. If amber could speak, what would it say to us humans? I have waited millions of years to tell you my stories. Please listen carefully and protect nature. While- reading Unlock the Language The writer uses ____________ with ___________________ to make facts ______ and expressions _______. that, whether and if clear precise 宾语从句 精确的 object clauses 1. For hundreds of years, people believed that dinosaurs looked like huge lizards. (1) hundreds of 几百；成百上千的 表示一个不确定的数目，前面没有具体数字，这时 hundred 后要加 -s，而且与 of 连用。 hundreds of 后接可数名词复数。类似的短语： · thousands of 几千；成千上万的 · millions of 数以百万计的 · billions of 数十亿的 · hundreds of people 成百上千个人 · thousands of trees 成千上万棵树 _____________ tourists visit the Great Wall every day. 成千上万的游客每天参观长城。 Hundreds of (2) look like 看起来像 like 是介词，意为“像”，后接名词或代词作宾语。 What does/do + 主语 + look like? ……长什么样？（询问外貌特征） The cloud in the sky ___________ a giant cotton candy. 空中那朵云看起来像一块巨大的棉花糖。 He ____________ his father. 他看起来像他的父亲。 1. For hundreds of years, people believed that dinosaurs looked like huge lizards. looks like looks like 2. However, thanks to a piece of amber, scientists now know that this idea is wrong. (1) thanks to 由于；因为；多亏 ___________ hard work, we all got good grades. 由于努力学习，我们都取得了好成绩。 ___________ Mary, I finished the homework on time. 多亏了玛丽，我才按时完成了家庭作业。 Thanks to Thanks to 2. However, thanks to a piece of amber, scientists now know that this idea is wrong. (2) a piece of 一块 / 片 / 条 / 首 / 张 / …… 其中 piece 为可数名词，意为“块；片；条；首；张……”。“a/some/many/基数词 /… + piece(s) of”后通常接不可数名词，表示不可数名词的量；piece 前有表示复数概念的词时，把 piece 变为复数形式即可。 a piece of meat 一块肉 three pieces of bread 三片面包 five pieces of paper 五张纸 six pieces of music 六首曲子 I need ___________ paper to write a note. 我需要一张纸来写一张便条。 My mother bought ___________ bread from the bakery. 我妈妈从面包店买了一片面包。 a piece of a piece of 3. This species no longer grows in this area. no longer (= not...any longer) 不再 常与延续性动词连用，位于系动词 be、情动态词或助动词之后，行为动词之前。 He __________ works in the factory. = He doesn’t work in the factory any longer. 他不再在这家工厂工作了。 no longer 4. Scientists used to believe that ants came from the northern half of the earth. (1) used to (do) 过去经常（发生），曾经 后接动词原形，表示过去存在的某种状态或者过去经常性、习惯性的动作，暗含现在已不再那样了。主语可以为人也可以为物。 Jim _________ work hard. 吉姆过去工作努力。 I ________ live in Hangzhou. 我曾住在杭州。 used to used to 5. As a window on the past, amber has been much studied. as ①【介词】作为；当作 As Chinese, we are proud of our country. 作为中国人，我们为我们的国家感到自豪。 He works as a train driver. 他是一名火车司机。 ②【介词】如同；像…… She was dressed as a child. 她打扮得像个小孩。 5. As a window on the past, amber has been much studied. as ③【连词】当……时 引导时间状语从句。 As I was walking down the street, an old man asked me about the way to the station. 当我在街上走时，一位老人问我去车站的路。 ④【连词】因为，由于 引导原因状语从句。 I asked Tom to go with me, as he knew the road. 我让汤姆和我一起去，因为他知道路。 Language points used to，be used to do, be used to doing 的用法 used to be used to do be used to doing 过去常常做某事,现在不做了 I used to play football after school. 被用来做某事是被动语态，表示用途。 Bamboo can be used to build houses. 习惯于做某事。 He is used to getting up early now. be used to doing 中的 to 是介词，千万不能接动词原形！ Exercises 1.I ______ play the piano, but I don't have time now. A. used to B. am used to C. am used to play 2.This machine ______ make cars. A. used to B. is used to C. is used to making 3.My father ______ drinking coffee after dinner. A. used to B. is used to C. is used to drink 单选题 汉译英。 将来我想成为一名老师。 2.从今以后，你必须按时完成作业。 3.这个盒子被用来存放书。 4.他习惯步行去上学。 5.我班里有超过 30 名学生。 Exercises I want to be a teacher in the future. This box is used to keep books. In future, you must finish your homework on time. He is used to walking to school. There are more than 30 students in my class. Homework Must do: Finish Act.4 on Page 70 and retell the passage. Choose to do: Read more about scientific discovery and share it next class. Thank you! Lavf60.16.100 null 152248.67 ｜新教材英语课件 null 16117.461 Lavf60.16.100 $