Unit 4 Section B 3a-3c 课件2026-2027学年人教版英语八年级上册

nullFails are the largest mamas on earth. They rank among the planets largest creatures at birth. Baby wales gain about two hundred pounds a day. During its first year. They become grown ups at about eight years old. The adult blue whales tongue alone can weigh as much as an elephant. The giant animals live on tiny shrimp like animals called grill. And adult blue whale can eat about four tons of grill a day. Blue wales breathe through logs to breathe out air. They spray water from holes in the top of their heads. Sometimes this break can shoot thirty feet up into the air. Blue wales tend to stay alone or in pairs. But how do they know the situation of their family members that are far away to communicate? The whales grow, and on their loudest sound can be heard up to one thousand miles away. The sound that does not only help with communication, but IT also guides them in the right direction in the lightning. Well, Young explorers, thanks for listening. See you next time. The blue whe is the largest and heaviest animal on earth. IT can weigh as much as two hundred tons. Many people like watching blue whales swim, and they think IT is one of the most beautiful things to see. Blue wales live in all oceans, except the arctic ocean. They eat a lot. They eat some of the tiny st. Animals in the ocean. A blue wale can eat around four tons of a day. Blue whales can live up to ninety years. When a blue whale dies at sea, IT becomes food for many kinds of animals living in and around the sea. This food lasts for over a year, and IT helps to create a lively and healthy ecosystem. Blue walls play an important role in our world, so we must protect them. 来自蓝鲸的信蓝鲸说，我是一只蓝鲸，马上要100岁了，即将走到生命的终点。那时候我的将沉入大海，身体的每一个部分都将归还大自然。我的一生很漫长，很艰难。捕杀、海洋污染、海底噪音、与船只碰撞、被渔网困住。博士说，从某种程度上来讲，现代工业是建立在大规模的鲸鱼之上的。金牛的价格曾一度和黄金一样，每一半的渔船都是用于捕鲸。近几年气候变暖使你们的迁徙和繁殖都变得更加困难。这些可能过于残忍，但事实确实如此。世界上不应该只有一种声音，生命的智慧不应该只有人类的智慧。 Presentation Unit4 Amazing Plants and Animals Section B How are plants and animals connected with us? (3a-3c) 读写课优质课 单元主题范畴：人与自然 单元主题内容：热爱与敬畏自然，与自然 和谐共生 (2024新版)人教版 八年级(上册) Presentation Learning Objectives 1.阅读关于蓝鲸的文本，提取并梳理蓝鲸体重、栖息地、食物、寿命以及在自然界中的重要性等关键信息，完成表格填写；总结介绍动物类文本的核心要素（如外形特征、生活习性、生态作用等）。（学习理解） 2.想象自己是一头蓝鲸，运用第一人称改写文本段落，内化文本中关于蓝鲸的描述性语言和表达逻辑；基于文本内容，完整撰写关于蓝鲸的文章，强化对动物科普类文本写作的掌握。（学习理解，应用实践） 3.迁移运用本单元相关词汇、语法知识以及说明性表达句型，准确介绍蓝鲸；理解蓝鲸在生态系统中的重要意义，增强保护濒危动物、维护生态平衡的意识。（迁移创新） Presentation Watch and say Let’s enjoy a short video and answer:What animal is it? A whale. What do you know about whales? Presentation Watch and learn What do you know about whales? Blue whales are __________ (large) mammals on earth. The adult blue whales tongue can weigh as_______as an elephant. They live on _____ shrimplike(像 虾的)animals called krill(磷虾). The sound does not only help with communication but also guides them in the night direction in the lightless_________ depths. the largest much tiny tiny/ˈtaɪni/ adj.极小的；微小的 ocean /ˈəʊʃn/ n. 大海；海洋 Presentation Look and predict Look at the title and the picture below. What aspects will the text talk about? Weight Where they live Food How long they live Role in ecosystem Problem Look at the title and picture, then answer the questions. 1. What’s the article about? Tip1：The title and the picture help to know the main idea of the article It’s about the blue whale. 2. What type of article is it? A. narrative (记叙文) B. story C. exposition (说明文) D. argumentation(议论文) It tells us many facts about the blue whale Presentation Read and answer Read the passage quickly and answer the questions. 1. How many paragraphs are there in this passage? 2. What’s the top sentences of each paragraph? 2 Reading Tip: A topic sentence(主旨句) is usually at the first sentence or last sentence. Two. 3.What’s the main idea of the text? The text mainly introduces some facts about blue whales, including their weight, food, lifespan(寿命), and their role in the ecosystem. Presentation Read and fill 3a Read the text and complete the table Blue whale facts Weight Where they live Food How long they live Importance in nature It can weigh as much as 200 tons. In all oceans except the Arctic Ocean. Some of the tiniest animals in the ocean, around four tons of them a day. up to 90 years food for other animals, create a lively and healthy ecosystem Blue whales play an important role in our world, so we must protect them. Presentation Read and answer Read Para. 1 and answer questions. Q1:What kind of animal is the largest and heaviest on earth? Q2:Which ocean do blue whales not live in? Q3:About how much food can a blue whale eat in a day? The blue whale. The Arctic Ocean. Around four tons. Presentation Read and answer Read Para. 2 and answer questions. Q1：How long can blue whales live? Q2：What happens when a blue whale dies at sea? Q3：Why must we protect blue whales? Up to 90 years. It becomes food for many kinds of animals living in and around the sea. Because blue whales play an important role in our world. /ˈlaɪvli/ adj. 精力充沛的；生机勃勃的 Presentation Read and fill in the blanks. The blue whale is the animal on earth. It can weigh 200 tons. Many people like watching blue whales swim, and they think it is the most beautiful things to see. Blue whales live in all oceans ______the Arctic Ocean. They eat a lot, but they eat some of the _________ animals in the ocean. A blue whale can eat around four tons of these a day. Blue whales can 90 years. When a blue whale at sea, it becomes food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a ecosystem. Blue whales our world, so we must protect them. largest and heaviest as much as one of except tiniest live up to dies lively and healthy play an important role in 最大且最重的 和...一样多 ...之一 除...之外 最小的 活到 死 充满生机且健康的 在...中扮演重要角色 Read and fill Presentation Read and say Read the passage again and tell us its structure. looks likes habitat food lifespan importance title the facts of blue whale the importance of blue whale Presentation Listen and repeat Presentation Watch and imitate Presentation Let’s appreciate the language Circle all the superlatives to describe the blue whale. the largest and heaviest the most beautiful the tiniest It can weigh as much as 200 tons. People like watching blue whales swim. It can eat around four tons of these a day. fact fact opinion Why does the author mention “the tiniest animals”after “heaviest”? the largest amazing keep balance the tiniest Tip2：superlatives can help us describe facts and opinions more vividly and convincingly Read and say Presentation Retell the passage according to the mind map The blue whale is the largest and heaviest animal on earth. Blue whales play an important role in our world, so we must protect them. weigh: as much as where they live: the Arctic Ocean food: tiniest animals how long they live: live up to 90 years Role in ecosystem: die...last...create.. Imagine you are a blue whale. How will you introduce yourself? Look and retell Presentation Watch and say The First Person Who is talking? Presentation Look and rewrite 3b Imagine you are a blue whale. Use the first person to rewrite the first paragraph. What should we mainly pay attention to when rewriting the article? Hello everyone! My name is Billy the Blue Whale. I am ________________ _______________________________ I’m heavy, but I love ______________ _______________________________ I live in ________________________ My favourite food is _____________ I can eat _______________________. 描述自身情况、体重 从蓝鲸角度说喜欢游泳 说明生存区域 阐述食物喜好 阐述食量  人称: 由第三人称变成第一人称 内容要点: 要点不能省略或者遗漏。 语言: 个别句子需要变化结构 weight living area food amount of food eaten hobbies Presentation Look and rewrite 3b Imagine you are a blue whale. Use the first person to rewrite the first paragraph. 写作指导 话题分析 文本体裁 人称 时态 需完成段落改写任务，核心改写对象是3a的第一段内容，涵盖蓝鲸的体型、重量、活动及分布等方面。 本文将第三人称的段落内容改写为第一人称，原是介绍类文章，改写后仍为自身特性介绍，属于说明文。 第一人称 一般现在时 Presentation Look and rewrite Share your writing in class. 注意是用第一人称进行介绍时的时候，要带着 “自己就是蓝鲸” 的感觉，语气亲切，像和朋友介绍自己一样。 Share your writing Presentation 3b points lifespan role /function importance I can live up to 90 years. When I die at sea, I become food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. I play an important role in our world, so you must protect me. Look and rewrite Imagine you are a blue whale. How will you introduce yourself? Magine you are a blue whale. Use the first person to rewrite the first Para. Imagine you are a blue whale. Use the first person to rewrite the first paragraph. Presentation Look and write 3c Complete your passage about the blue whale based on the text in 3a. Step 1: Order-outline. weigh where I live food I Topic sentence+details 介绍鲸鱼： 写作指导 文本体裁 话题分析 人称时态 记叙文+说明文 用 “I（我）” 的视角和一般现在时 Presentation Look and write 3c Complete your passage about the blue whale based on the text in 3a. Step 2: Wording and phrasing[遣词造句] 我是我们星球上最大且最重的生物。 在地球上所有的动物中，我是最大的，体重也是最重的。 地球上没有比我更大或更重的动物了。 Para.1 I'm the biggest and heaviest creature on our planet. Among all the animals on Earth, I'm the largest and have the greatest weight. There's no animal on Earth that's larger or heavier than me. Presentation Look and write 3c Complete your passage about the blue whale based on the text in 3a. Hello everyone! My name is Billy the Blue Whale. I am __________________________________________________________________ I’m heavy, but I love _______________________________________________ . I live in __________________________________________________________. My favourite food is ________________________________________________ I can eat _________________________________________________________. the largest and heaviest animal on earth. My weight is as much as 200 tons. swimming in the ocean. Many people like watching me swim, and they think I am one of the most beautiful things to see all oceans except the Arctic Ocean. some of the tiniest animals in the ocean. around four tons of them a day. Para.2 Step 2: Wording and phrasing[遣词造句] Presentation Look and write 3c Complete your passage about the blue whale based on the text in 3a. Step 3: Draft your essay about the blue whale. Hello everyone! My name is Billy the Blue Whale. I am __________________________________________________________________ I’m heavy, but I love _______________________________________________ . I live in __________________________________________________________. My favourite food is ________________________________________________ I can eat _________________________________________________________. Presentation Look and write 3c Complete your passage about the blue whale based on the text in 3a. Evaluation Checklist (标准清单) Yes(√) No(×) Content& Structure (内容&内容) Cover the details of introducing the blue whale. Have clear topic sentence and details. Language （语言） Using the theme vocabulary of the unit. (使用本单元主题相关词汇) Using the Simple Present Tense. (使用一般现在时) Form (格式) Write the sentences with correct capital letters and punctuation. (句子中的大写字母和标点需规范) Write neatly. (整洁的书写) Presentation Look and write 3c Complete your passage about the blue whale based on the text in 3a. Sample writing Hello, everyone! I'm a blue whale, and let me introduce myself to you. I am the largest and heaviest animal on earth. Can you imagine? I can weigh as much as 200 tons. Many people love watching me swim, and they think I’m one of the most beautiful sights out there.I live in all oceans except the Arctic Ocean. Now, about my diet—though I eat a lot, I actually feed on some of the tiniest animals in the ocean. In fact, I can eat around four tons of these little guys every single day. What’s more, I can live up to 90 years. When I pass away at sea, I become food for many kinds of animals living in and around the sea. This food source lasts for over a year and helps build a lively and healthy ecosystem. Blue whales like me are very important to the world. So, I really hope all of you can care about and protect us. Let's work together to keep us blue whales alive and well in the ocean! introduction facts importance protection Presentation Watch and say Why we should protect them? What are their lives like? Let’s read a letter from a blue whale. Presentation Think and say Difficulties 06 04 02 collision（碰撞） with ships 。。。 Trapped（困住） in fishing nets 05 01 hunting underwater noise pollution 03 What difficulties are they facing? Presentation Look and say 1. We can learn more about blue whales from books or videos, so we can tell others correctly why they need protection. What can we do for them? 2. We should use less plastic in daily life, like bringing our own water bottles instead of buying plastic ones. This helps keep the ocean clean for blue whales. 3. We can draw posters about blue whale protection and put them up at school, letting more classmates know about this important thing. 4. We can join school activities about ocean protection, such as lectures or hand - made workshops, to do our small part for blue whales. Presentation Animals shouldn’t require our permission to live on the earth. Animals were given their right to be here long before we arrived. Blue whales play an important role in our world, so we must protect them. Look and say Presentation Language points The blue whale is the largest and heaviest animal on earth. It can weigh as much as 200 tons. Many people like watching blue whales swim, and they think it is one of the most beautiful things to see. Blue whales live in all oceans except the Arctic Ocean. They eat a lot, but they eat some of the tiniest animals in the ocean. A blue whale can eat around four tons of these a day. Blue whales can live up to 90 years. When a blue whale dies at sea, it becomes food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. Blue whales play an important role in our world, so we must protect them. /ˈəʊʃn/ n. 大海；海洋 /ɪkˈsept/ prep. 除……之外；除了 tiny /ˈtaɪni/ adj. 极小的；微小的 lively /ˈlaɪvli/ adj. 精力充沛的；生机勃勃的 在地球上 多达，达到…… 之多 live up to 达到；符合 一个生机勃勃和健康的生态系统 扮演一个重要的角色 Presentation Language points 1.Blue whales live in all oceans except the Arctic Ocean. 蓝鲸生活在除北冰洋以外的所有海洋中。 ① except /ɪkˈsept/prep. 除…… 之外；除了 辨析：except, but 与 besides except “除… 之外”，强调所排除的内容不包括在内，含有 “减去” 的意思。 but “除…… 之外”，常用于 nothing、all、anything、anyone、everything、everyone 等词之后。 besides “除…… 之外（还）”，包括 besides 后面的内容，含有 “加上” 的意思。 Everyone went to the park ______ Tom. A. except B. but C. besides 2. ______ English, he also studies French. A. Except B. But C. Besides 3. Nothing ______ a dictionary is in the bag. A. except B. but C. besides 4.We all like playing basketball ______ John. He likes football. 5._________ singing, she is good at dancing too. 6.There is nothing in the room ________ a chair. except Besides but Presentation Language points 2.This food lasts for over a year and it helps to create a lively and healthy ecosystem. 这些食物足够维持一年以上，有助于创造一个生机勃勃的健康生态系统。 ① lively /ˈlaɪvli/adj. 精力充沛的；生机勃勃的 辨析：lively, alive, live 与 living lively 生气勃勃的；(色彩) 鲜艳的 修饰人或物 常作定语或表语 alive 活着的 修饰人或物 常作表语或补语 live 活的,读作 /laɪv/ 修饰人或物 一般作前置定语 living 活着的 修饰人或物 常作定语 Presentation Language points 用 lively, alive, live 或 living 填空 eg：He was the only man alive in the accident.他是那场事故中唯一活着的人。 eg：All living things need water and air.所有生物都需要水和空气。 eg：She is a lively girl and everyone likes her. 她是个活泼的女孩，每个人都喜欢她。 eg：They watched a live football match.他们观看了一场现场直播的足球比赛。 用 lively, alive, live 或 living 填空 The old man is still ______ though he is over 100 years old. She has a ______ personality and always makes people around her happy. We saw a ______ broadcast of the concert. This is a ______ room with many plants. alive lively live lively Presentation Language points 3.Blue whales play an important role in our world, so we must protect them.蓝鲸在我们的世界中发挥着重要作用，所以我们必须保护它们。 role n.角色；作用；职责；任务 【常用短语】 play a role (in) 在...中发挥作用；(在…中)有影响; 扮演角色，相当于______________ eg：Trees play an important role in maintaining ecological balance. 树木在维护生态平衡方面起着重要的作用。 play a part (in) Schools play an important role in education. 学校在教育中起着重要的作用。 对于许多人来说，博物馆在我们生活中一直发挥着重要的作用。 For many of us, museums __________________________ in our lives all the time. play an important role/part Presentation Language points 4.They mean a lot to me. 它们对我来说意义重大。 mean to do打算做某事 mean doing意味着做某事 meaning n. 意义,含义 meaningful adj. 有意义的，意味深长的 【对点练习】 (1)Running everyday means_________(build)a strong body. (2)I didn’t mean ______________(break) the window—it was an accident. building to break Presentation Language points 5.The smallest frogs are about the size of a pea, while larger ones can grow as bigas a human hand.最小的青蛙大约只有豌豆那么大，而大一点的青蛙能长到人类手掌那么大。 while 【连词】 ①而;然而 表示两种情况的对比。 e.g. I like coffee while my sister likes tea.我喜欢喝咖啡,而我姐姐喜欢喝茶。 ②与……同时;当……的时候 引导时间状语从句,从句谓语动词须用延续性动词。它强调主句的动作是在从句动作发生的过程中发生的,或者主从句的动作几乎同时进行。 Presentation Class test 一、 根据汉语意思，完成英语句子 1. 西蒙不能想象没有宠物的生活。它们对他意味着很多。 Simon his life pets. They a lot him. 2. 青蛙在我们的生态系统中起着重要的作用。 The frogs in our ecosystem. 3. 一头蓝鲸可能重达200吨。 A blue whale can 200 tons. 4. 将来人类能活到120岁。 The humans can 120 years old in the future. can’t　 imagine　 without　 mean　 to　 play　 an　 important　 role　 weigh　 as　 much　 as　 live　 up　 to　 Presentation Class test 一、选词填空 用方框中所给单词的适当形式补全短文（有两个多余）。 drop　main　serious　protect　important　fact　result　use　with　tiny　live　role What will our world be like if there are no insects？ It might sound nice in the beginning. There would be no bugs or flies in your room. But in 1. ， this could cause really 2. problems. The bad news is that the number of insects keeps 3. ⁠ these years. Scientists say it’s 4. because of the use of pesticides（杀虫剂）. They destroy the places that insects live in. What would happen if all insects died out？ The results would be terrible. The insects help keep the ecosystem 5. . We need insects to pollinate plants. They also break down dead plants and animals and turn them into new 6. _______ things. We need them to keep the soil（土壤） healthy. As one of the 7. ______ creatures， they play an important role in the ecosystem. 8.________ insects， many animals would have nothing to eat. They would go hungry and die. fact　 serious　 dropping　 mainly　 lively　 useful　 tiniest　 Without　 Presentation Must do 1. 以“Blue Whale: A Giant of the Ocean”为题，用中文写一篇介绍蓝鲸的短文，涵盖其体型、栖息地、食物、寿命及生态意义等内容，不少于150字。 2. 收集1-2张蓝鲸的图片，并用简单的英文标注图片内容（如“Blue whale swimming in the ocean”）。 Choose to do 1. 查阅资料，了解蓝鲸目前的生存现状（如是否濒危、面临的威胁等），用英文写一段相关介绍，字数不限。 2. 创作一个以蓝鲸为主角的小故事，可发挥想象，语言风格不限，中英均可。 $Can you guess I am, I am a blue. Well, am IA fish? No, I am a mamo. A fish can breathe under the water, but I can not. So I have to come out of the water to breathe. Look at me, breathe. I spell water high into the air. I am the biggest of all living animals. I just eat the small lest creatures in the ocean. They are called planting. I also eat grill. I like quill the best. I have no teeth. Let me show you how I eat first. I got a large mouth full of water, then I pushed the water out of my mouth. When you sell on the ocean wave at me, then I will salute you. The blue whale, the blue whale is the largest and heaviest st animal on earth. You can wait as much as two hundred towns. Many people like watching blue whales swim, and they think this is one of the most beautiful things to see. Blue walls live in all oceans, except the arctic ocean. They eat a lot, but they eat some of the tiny st. Animals in the ocean. A blue wheel can eat around four tons of these a day. Blue whales can live up to ninety years. When a blue whale dies at sea, IT becomes food for many kinds of animals living in and around the sea. This food lasts for over a year and helps to create a lively and healthy ecosystem. Blue whales play an important role in our world, so we must protect them.