Unit 5 Looking into nature Starting out & Understanding ideas同步分层作业2026-2027学年外研版初中英语八年级下册

Unit 5 Looking into nature Starting out & Understanding ideas 分层作业 建议用时：25分钟 一、单词汉译英（Unit 5 单词表：阅读课·Secrets caught in time） 1. 恐龙 ____________　　2. 羽毛，翎 ____________ 3. 蜥蜴 ____________　　4. 琥珀 ____________ 5. 是否 ____________　　6. 物种 ____________ 7. 不知道的，未知的 ____________　　8. 北部的 ____________ 9. 观点，看法 ____________　　10. 完全地，彻底地 ____________ 11. 揭开，解锁 ____________　　12. 放大镜 ____________ 二、短语汉译英（教材原短语） 1. 揭开某事的秘密 ____________　　2. 多亏了；由于 ____________ 3. 不再 ____________　　4. 过去常常（做） ____________ 5. 回望过往的窗口 ____________　　6. 属于 ____________ 7. 继续做某事 ____________　　8. 自然奇观 ____________ 三、词形变换 1. north → ____________（形容词，北部的）　2. believe → ____________（名词，观点） 3. full → ____________（副词，完全地）　4. lock → ____________（动词，揭开，解锁） 5. Africa → ____________（形容词，非洲的） 一、单句填空（用括号内所给词的适当形式填空） 1. Thanks to a piece of amber, scientists now ____________ (know) that this idea is wrong. 2. We now know that dinosaurs ____________ (have) feathers. 3. The species no longer ____________ (grow) in this area. 4. Scientists used to ____________ (believe) that ants came from the northern half of the earth. 5. More than 300 unknown species ____________ (discover) thanks to amber so far. 二、根据汉语意思完成句子（每空一词） 1. 多亏了一块琥珀，科学家们现在知道这个观点是错误的。 　Thanks to a piece of amber, scientists now ____________ that this idea is ____________. 2. 它们能告诉我们恐龙是否长有羽毛。 　They can tell us ____________ dinosaurs ____________ feathers. 3. 这个物种已不再生长在该地区。 　This species ____________ ____________ grows in this area. 4. 琥珀是回望过往的窗口。 　Amber is a ____________ ____________ the past. 5. 科学家过去曾认为蚂蚁起源于北半球。 　Scientists ____________ ____________ believe that ants came from the northern half of the earth. 三、句型转换 1. Scientists found a dinosaur tail with feathers in the amber.（对画线部分提问） 　____________ ____________ scientists ____________ in the amber? 2. Amber can tell us whether dinosaurs had feathers.（改为否定句） 　Amber ____________ ____________ us whether dinosaurs had feathers. 3. The flower grew in this area 35 million years ago.（对画线部分提问） 　____________ ____________ the flower ____________ in this area? 4. Scientists discovered 13 ants in a piece of amber from Africa.（改为被动语态） 　13 ants ____________ ____________ in a piece of amber from Africa. 5. "Did dinosaurs have feathers?" Scientists can tell us.（合并为含宾语从句的句子） 　Scientists can tell us ____________ dinosaurs ____________ feathers. 四、选词填空（阅读课词汇） 【dinosaur　feather　amber　species　unknown】 1. A ____________ is a beautiful golden stone that keeps pieces of the past. 2. This kind of ____________ no longer grows in this area. 3. Scientists have found more than 300 ____________ species thanks to amber. 4. Each ____________ of the bird is light and soft. 5. The ____________ ran around the ancient forest looking for its next meal. 五、情景补全对话（5个空，6个选项，1项多余） A. What did they find in it　B. How many new species have been found C. Is it about things in the future　D. Why is amber so important E. What are you reading　F. How old is the amber A: Hi, Ben. 1. ____________ B: I'm reading an article about amber and dinosaurs. A: Amber? What is it? B: It's a beautiful golden stone that keeps pieces of the past. A: 2. ____________ B: No, it's not about the future. It is a window on the past. A: I see. 3. ____________ B: In amber from Southeast Asia, scientists found the tail of a dinosaur with feathers. A: Wow! 4. ____________ B: More than 300 unknown species have been discovered thanks to amber. A: 5. ____________ B: Because it can help us unlock more secrets of nature. 拓展阅读（课内同源 + 课外同源） Passage 1（课内同源：Secrets caught in time） 　　Imagine a dinosaur in an ancient forest. It is running around, looking for its next meal. With an angry cry, it opens its mouth and raises its beautiful feather-covered arms. 　　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. 　　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. 　　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. 　　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. 任务一：单项选择 1. What did people believe about dinosaurs for hundreds of years? A. They were very small animals.　B. They lived in big cities. C. They looked like huge lizards.　D. They could not fly at all. 2. What does the writer think we should do about amber? A. Study it with more effort.　B. Sell it to make money. C. Put it into a museum only.　D. Use it to make beautiful jewellery. 任务二：判断正误（T/F） 3. The flower in the amber from Northern Europe still grows in that area today. （　　） 4. Amber is a window on the past and a key to unlock more secrets of nature. （　　） 任务三：简答 5. Why has the discovery of the African ants changed old beliefs? _______________________________________________________________________________ Passage 2（课外同源：A fish that came back from the past） 　　Many years ago, scientists believed that a big fish called the coelacanth （腔棘鱼） had died out about 65 million years ago. They could only see it in the fossil record. So imagine how surprised people were when a living coelacanth was found in the sea in 1938! 　　A young scientist named Marjorie Courtenay-Latimer saw the strange blue fish at a fish market in South Africa. She did not know what it was, so she wrote to other scientists. At first, nobody believed that it was a real coelacanth. But after careful study, scientists agreed that it was the same kind of fish that had lived long before the dinosaurs died out. 　　This discovery shows us something important: the story of life on earth is full of surprises. When we think a species has disappeared, it may still be hiding somewhere in the deep sea. Scientists have since found more coelacanths near Indonesia, more than 10,000 kilometres away from the first one. 　　"Nature never stops surprising us," says one scientist. "The more we look, the more we find out about the world we live in." 任务一：单项选择 1. What did scientists think about the coelacanth before 1938? A. It lived in rivers.　B. It looked like a lizard. C. It was a kind of dinosaur.　D. It had died out long before. 2. What does the story mainly tell us? A. Fish markets are good places to do research.　B. Nature can surprise us when we keep looking. C. Fossils are more useful than living animals.　D. All sea animals are very easy to find. 任务二：判断正误（T/F） 3. Marjorie Courtenay-Latimer was the first to see the living coelacanth. （　　） 4. Scientists have only ever found one coelacanth in the world. （　　） 任务三：简答 5. Where were more coelacanths found later? _______________________________________________________________________________ 任务四：单元微写作 　　以“A discovery in nature”为题写一段短文：介绍你了解或亲身经历过的一次自然发现（你发现了什么、是怎么发现的、它告诉了我们什么、你的感受），不少于8句话，请使用 discover、species、finding、thanks to、a window on the past、unlock the secrets of 等表达。 _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 参考答案 夯实基础 一、单词汉译英　1. dinosaur　2. feather　3. lizard　4. amber　5. whether　6. species　7. unknown　8. northern　9. belief　10. fully　11. unlock　12. magnifier 二、短语汉译英　1. unlock the secrets of sth.　2. thanks to　3. no longer　4. used to do sth.　5. a window on the past　6. belong to　7. carry on with sth.　8. natural wonder 三、词形变换　1. northern　2. belief　3. fully　4. unlock　5. African 能力进阶 一、单句填空　1. know　2. had　3. grows　4. believe　5. have been discovered 二、完成句子　1. know; wrong　2. whether; had　3. no longer　4. window on　5. used to 三、句型转换　1. What; did; find　2. can't tell　3. When; did; grow　4. were discovered　5. whether; had 四、选词填空　1. amber　2. species　3. unknown　4. feather　5. dinosaur 五、情景补全对话　1. E　2. C　3. A　4. B　5. D；多余项：F 拓展提高 Passage 1　任务一：1. C　2. A　任务二：3. F　4. T　任务三：5. Because scientists used to believe that ants came from the northern half of the earth, but the African species shows ants did not only come from there.（言之有理即可） Passage 2　任务一：1. D　2. B　任务二：3. T　4. F　任务三：5. Near Indonesia.（言之有理即可） 任务四范文：Last year, I read a book about nature and learnt something amazing. Scientists once believed that dinosaurs had no feathers. They thought dinosaurs looked like huge lizards. However, thanks to a piece of amber from Southeast Asia, they found the tail of a dinosaur with feathers. This finding shows that dinosaurs may have had feathers. Thanks to amber, scientists have also discovered more than 300 unknown species. To me, a piece of amber is like a window on the past. I have learnt that we can unlock the secrets of nature if we keep looking. From this discovery, I understand that nature never stops surprising us, and we should always be curious about the world. 学科网（北京）股份有限公司 $