Unit 5 Looking into nature Starting out & Understanding ideas—Reading （教学课件）-2025-2026学年外研版八年级英语下册

该初中英语课件围绕“琥珀的科学价值”展开，核心知识点包括amber、species等核心词汇及琥珀的科学作用。课堂导入通过科学家图片问答、猜谜游戏、视频观看，从自然探索者共性到琥珀特性，搭建从已知到未知的学习支架，引导学生逐步深入主题。 其亮点在于以任务驱动提升思维品质，如图表填充梳理琥珀功能培养逻辑归纳能力，结合猜谜和视频激发学习兴趣。语言能力方面，通过长难句分析和对点练习强化词汇语法运用，帮助学生清晰表达观点。对学生提升信息处理和批判性思考能力，对教师提供多样化教学活动和结构化流程，提高教学效率。

Unit 5 Looking into nature (Starting out & Understanding ideas—Reading) 通过本节课的学习，同学们将能: 重点：1. 理解并运用文中核心词汇（如 amber, species, unlock, secret 等），梳理琥珀的科学价值。 2. 理解琥珀的科学作用，完成信息图表的填充。 难点：1. 通过图表梳理信息，培养逻辑归纳和批判性思考能力。 2. 理解文中长难句的逻辑，并用英语清晰表达 自己对“探索自然秘密”的看法。 学习目标 New words dinosaur n. 恐龙 feather n.羽毛，翎 lizard n. 蜥蝎 amber n. 琥珀 species n. 物种 African adj.非洲的，非洲人的 northern adj. 北部的 unknown adj.不知道的，未知的 fully adv. 完全地；充分地；彻底地 newspaper n.报(纸) belief n. 观点 unlock v.揭开 style n. 风格 text n.文字材料 writing n. 写作，著书 method n.方法，办法 argument n. 论点，论据 alive adj. 有活力的，有生气的 Look at the pictures and answer the questions. 1 1 What do you know about these people? 2 What do they have in common? Li Shizhen wrote Compendium of Materia Medica(《本草纲目》)． Charles Darwin studied evolution. Wang Zhenyi was a Chinese astronomer(天文学家)． They all studied nature. They all made great discoveries about nature. /əˈstrɒnəmə(r)/ 2 Look at the picture and answer the questions. 1 What secrets of nature do you know? 2 Which one do you want to explore more? I know that some animals can change their colors to hide from enemies./… I want to explore more about how the universe was formed and whether there is life on other planets. There is a substance called “time machine”. It comes from trees, but it is not wood. It looks like gold, but it’s not metal. It can keep small bugs inside . What is it？ Guessing game Watch a video Do you know the answer from this video ？ Amber Pre-reading What can you think of if we mention amber？ Amber secret unlock bright time While-reading Fast-reading: What type of text is this passage? A. A fictional story about dinosaurs. B. A science article explaining the importance of amber. C. A poem about nature. D. A personal diary about a trip to a museum. While-reading Careful-reading: 1.What does the first paragraph describe? A. A real event that happened millions of years ago. B. An imagined scene of a dinosaur in an ancient forest. C. A famous scientific experiment. 2.Why does the author start the passage with this description? A. To make readers want to read more. B. To show that he is a good storyteller. C. To prove that dinosaurs had feathers. 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.. 伴随着一声愤怒的叫声 Read paragraph 1 and choose the best answer. Read paragraphs 2－4 and match the species with the paragraphs. a. dinosaur b. ants c. flower Paragraph 2 ___________ Paragraph 3 ___________ Paragraph 4 ___________ a c b 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. 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. 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? 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. Old believe : _____________________________________________ ______________________________________________ New discovery:___________________________________________ ___________________________________________ Change: This discovery proved that the old idea was wrong. For hundreds of years, people believed that dinosaurs looked like huge lizards. In the amber from Southeast Asia, scientists found the tail of a dinosaur—with feathers. 看起来像 多亏，由于 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. 1.What do “These beautiful golden stones” and “it” refer to？ These beautiful golden stones refer to amber. It refers to the flower. 2. What does the find of the flower prove?  It proves that the flower species grew in that area 35 million years ago, showing that life on earth has always changed. 一块琥珀 不再 久而久之 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? 1. ( ) More than 300 unknown species have been discovered thanks to amber. 2. ( ) Scientists found 13 new ant species in amber from Northern Europe. 3. ( ) Scientists used to believe that ants came from the southern half of the earth. 4. ( ) The discovery of the African ant species changed old beliefs about ant history. 5. ( ) The author is sure that this piece of amber will tell us more secrets. T F F T F 过去常常 超过 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. 作为一扇通往过去的窗口 put more effort into research投入更多精力进行研究 What is the author's attitude towards the study of amber? A. Negative and uninterested. B. Positive and encouraging. C. Doubtful and cautious. D. Indifferent and bored. Choose where you are most likely to read this passage. 3 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 travelling160 million years into the past. Post-reading Scientists found a new species of 6______ in a piece of amber from Africa. More than 300 5__________species have been discovered. It helps us understand that life on earth has 3________. 2___________ a piece of amber, scientists know that dinosaurs had feathers. A piece of amber proves that a species of flower grew in Northern Europe 4____________ years ago. Complete the diagram with the words and expressions from the passage. 4 always changed 35 million unknown ant It shows us what ancient species looked like. It helps us discover new species. Amber shows us 1__________caught in time. Amber is a(n) 7___________ on the past, and a key to unlock more secrets of 8_________. secrets Thanks to window nature Think and share 1 What do you think of Paragraph 1? Why does the writer begin like this? Learning to think for question 1 Writers have different writing styles. They use different methods to achieve their goals. These goals include making the text alive, making their arguments strong, getting readers' attention, etc. (1) I think Paragraph 1 is exciting and vivid. It describes a lively scene just like a movie, which makes me eager to read on and know what will happen next. (2) Grab the reader's attention and create curiosity. Think and share 2 What are some other ways for you to learn about nature's secrets? Visit museums and science exhibitions. Watch nature documentaries and educational videos online. Read science books and magazines about biology and the environment. Language points 1. It is running around, looking for its next meal. 它正在四处奔跑，寻找它的下一餐。 look for sb/sth:寻找某人/某物 例如：I'm looking for my keys. They are missing. 我在找我的钥匙，它们不见了。 含义 常用时态 结果 look for 寻找(强调过程) 现在进行时、过去进行时 找没找到不确定 find 找到(强调结果) 一般现在时、一般过去时 已经找到/发现了 【对点练习】 用look for，find完成句子 1. 他在找什么？ What is he ________ ______? 2. Lucy 在找我的数学课本，她没有找到。 Lucy is _______ ____ my maths book. She can't ______ it. looking for looking for find 2. For hundreds of years, people believed that dinosaurs looked like huge lizards. 数百年来，人们一直认为恐龙看起来就像巨大的蜥蜴。 (1) For many years, people believed that… 多年来，人们相信······ (2) look like… 看起来像······ 【对点练习】 1. 很久以前，人们认为地球是平的。 People _________ that the earth was flat long ago. 2. 数百年来，人们一直爱着这个故事。  ______ hundreds of years, people have always loved this story. 3. 他看起来像他的父亲。 He _______ ______ his father. believed For looks like (1) thanks to：多亏了；由于。后接名词/代词/动名词 (2) a piece of amber：一块琥珀 不可数名词用量词：a piece of… 例如：a piece of paper 一张纸, a piece of news 一条新闻 【对点练习】 1.Thanks to ____ (he), we won the game. 2.这是一条好消息。 This is a piece of good news. 3. However, thanks to a piece of amber, scientists now know that this idea is wrong.然而，多亏了一块琥珀，科学家们如今已知道这一观点是错误的。 him 4. This species no longer grows in this area. But the find proves that it did 35 million years ago.这个物种如今在该地区已绝迹。但这个发现证明，三千五百万年前它确实生长于此。 (1) no longer：不再 用法：放在实义动词前，be动词/助动词后。 (2) prove (that)…：证明······，后面可以接句子。 (3) did = grew 这里 did 用来代替前面出现过的动词 grew，避免重复。 【对点练习】 我不再住在这里了。 I no longer live here. used to (do)在此处意为“过去经常(发生)，曾经”。 例如:I used to play the piano when I was younger. 我年轻的时候经常弹钢琴。 拓展： (1) used to do过去常常做某事(现在不做了) 例：My father used to go to work by car.我父亲过去常开车去上班。 (2) be used to do被用来做······ 例：Pens are used to write. 笔是用来写字的。 (3) be/get used to doing 习惯做······ 例：I am/get used to going to school on foot.我已经习惯步行上学了。 5. Scientists used to believe that ants came from the northern half of the earth. 科学家们过去曾认为蚂蚁起源于地球的北半部。 【对点练习】 1. He ____ live in a small village, but now he lives in a city. A. used to B. is used to C. uses to 2. This machine ____ wash clothes. A. used to B. is used to C. get used to 3.—What do you usually do before going to bed? —I ____. A. used to write diaries B. am used to sleeping C. am used to reading 当堂检测 一、根据句意及汉语提示填空 1. A ________ (恐龙) lived on the earth a long time ago. 2. Birds use their ________ (羽毛) to fly. 3.A ________ (蜥蜴) is a small long-tailed animal. 4. The insect is in the ________ (琥珀). 5. There are many different ________ (物种) in the rainforest. 6. Some places on the earth are still ________ (未知的). 7. My uncle lives in the ________ (北部的) part of China. 8.I ______________ (完全地) agree with you. 9. We hope to ________ (揭开) the secrets of nature. 10.  His _________ (论点) is very strong. dinosaur feathers  lizard amber  species unknown northern fully/completely  unlock argument 二、用所给单词的适当形式填空 1. We have some new ________ (method) to learn English. 2. He is from Africa. He is an ________ (Africa) boy. 3. Good ________ (write) needs a good style. 4. One of his ________ (belief) is wrong. 5. Is the fish still ________ (live)? methods  African writing  beliefs alive 三、单项选择 1. We should try to ______ the secrets of nature. A. lock B. unlock C. find 2. He is ______ late for school. A. no long B. not long C. no longer 3. ______ your help, I passed the exam. A. Thanks for B. Thanks to C. Thank you 4. He looks ______ his father. A. like B. as C. same 5. I don’t know ______ he is right or not. A. if B. whether C. that THANKS null 151935.17 $