Unit 4 The Wonders of Nature Section A1a-2d课件2025-2026学年人教版英语八年级下册

该初中英语课件围绕“自然奇观”主题，涵盖地理事实描述、大数字表达、形容词最高级及数量描述等核心语言知识。通过图片匹配、视频导入（如维多利亚瀑布视频）引发兴趣，衔接听力活动（地理知识竞赛）、对话练习（自然奇观问答），构建从词汇到语用的学习支架。 其亮点在于融合多模态资源（视频、深海深度信息图表）与任务型活动（如“奋斗者”号深潜对话），助力语言能力（大数字表达、最高级句型应用）、思维品质（分析深海探索意义）及文化意识（中国科技成就）培养。学生能提升综合语言运用与探究能力，教师可依托结构化活动高效开展教学。

Section A (1a-2d) The Wonders of Nature Unit 4 In this unit, you will: 1. talk about geography facts about natural wonders. 2. compare facts about famous places. 3. share geography facts using large numbers. 4. explore how and why people connect with nature. 地理事实 自然奇观 /ˈwʌndə(r)/ 亲近自然 Look and share 1. Do you know the name of the waterfall in the photo? Where is it? It's Victoria Falls in southern Africa. 2. What do you think is special about it? (video) waterfall It’s amazing and shocking! Visitors can feel the great power of nature and see bright rainbows all around. It is very wide and tall. (about 1.7 kilometers wide and 108 meters tall). It’s one of the most famous waterfalls in the world. Look and share What natural wonders can you see in the pictures? river 河流 waterfall 瀑布 mountain 高山 desert 沙漠 trench 海沟 sea 海洋 1a Match the places with the pictures. ____Nile River ____Dead Sea ____Angel Falls ____Sahara Desert ____Mount Qomolangma ____Mariana Trench A B C D E F F A D C E B / naɪl/ /ˈeɪndʒl/ /ˈtʃəʊməʊˌlɑːŋmə/ /səˈhɑːrə/ /ˈdezət/ /ˈmæriˈænə/ / trentʃ / 尼罗河 安赫尔瀑布 珠穆朗玛峰 死海 撒哈拉沙漠 马里亚纳海沟 What is special about each place? the Nile River （6671km） How long is it? It’s 6,671 kilometres long. What is special about it? It’s the longest river in the world. It helps ancient Egyptian civilization develop. six thousand six hundred and seventy-one /ɪˈdʒɪpʃn/ /ˌsɪvəlaɪˈzeɪʃn/ 古埃及文明 the Angel Falls （979m） How high is it? What is special about it? It’s the highest waterfall in the world. nine hundred and seventy-nine It’s about 979 metres high. How can we read these large numbers? How can we read large numbers? 2 506 112 375 ①先从右至左数,每三位 数加一个逗号.(先忽略 小数点及后面部分) , , , ②第一个逗号代表thousand(千), 第二个逗号代表 million(百万), 第三个逗号代表billion(十亿). thousand 千 million 百万 billion 十亿 two billion, five hundred and six million, one hundred and twelve thousand, three hundred and seventy-five, . 53 ③point+小数 点后逐个读 point 点 point five three e.g. 2506112375.53 注意: ① 英语中没有“万”这个单位,“万”须借用“千”表示(ten thousand),“十万”用“十个千”表示(one hundred thousand)。 ② hundred 后通常加连词 and。若读数中百位数为 0, 则在 thousand 后加 and。 How can we read large numbers? 9,083 9,000,000 11,000 nine thousand and eighty-three nine million eleven thousand 416 four hundred and sixteen 8,848.86 eight thousand, eight hundred and forty-eight point eight six Everyone, welcome to our geography game show. Let’s learn about more natural wonders! 1b Listen to the game show. Complete the descriptions of the places. Place Description Mount Qomolangma the ___________ in the world Sahara Desert the ___________ in the world Dead Sea the ___________ on earth Mariana Trench the ___________ in the ocean Superlative forms of adjectives(最高级) 对这些地方的描述 highest biggest lowest place deepest point Check like this: Mount Qomolangma is the highest mountain in the world. 1c Listen again. Complete the measurements in 1b with the numbers below. Place Description Measurement Mount Qomolangma the highest in the world ________ metres high Sahara Desert the biggest in the world about _____________ square kilometres in size Dead Sea the lowest place on earth _________ metres below sea level Mariana Trench the deepest point in the ocean about _________ metres deep 416 8,848.86 11,000 9,000,000 8,848.86 9,000,000 416 11,000 Let’s introduce the four natural wonders according to the table. /ˈmeʒəmənt/ 测量 Introduction There are many amazing natural wonders in the world. Mount Qomolangma is the _______________ in the world. It’s __________ metres high. The Sahara Desert is the ____________ in the world. It’s about ____________ square kilometres in size. The Dead Sea is the ____________ on earth. Its surface is __________ metres below sea level. The Mariana Trench is the ____________ in the ocean. It’s about ________ metres deep. highest mountain 8,848.86 biggest desert 9,000,000 lowest place 416 deepest point 11,000 Mount Qomolangma Sahara Desert Mariana Trench Dead Sea Language Points 1. 8,848.86 metres high 8848.86米高 这座楼约有50米高。 The building is about 50 metres high/tall. 数量的表达 在英语中，表示"事物的长、宽、高"等时，其表达方式为: 基数词+表示'度量'的名词 (metre,kilometre,foot等)+形容词(long, wide,high/tall等) 注意: 若基数词大于1，则表示"度量"的名词应用复数形式。 2. about 9,000,000 square kilometres in size 面积约900万平方千米 这个广场面积大约500平方米。 The square is about 500 square metres in size. in size 在尺寸上；在大小方面 拓展: 英语中，表示"事物的长、宽、高"等时，还可用: 基数词+'度量'名词+in size/length/height Analyze Ask about natural wonders Talk about geography facts • What’s the lowest/highest/biggest/ deepest place in the world/on earth? • How low/high/big/deep is it? • Where’s ...? • It’s the -est in the world/ on earth. • It’s ... metres/kilometres deep/high. It’s ... square kilometres (in size). • It’s in the... Give feedback (反馈) • Correct / Right / Wrong / Well done. • That’s correct/ right. 1d Talk about the places you have learnt about. A: What's the lowest place on earth? B: It's ... A: How low is it? B: Its surface is ... metres below sea level. A: Now, what's ... Mount Qomolangma Sahara Desert Mariana Trench Dead Sea Section A (2a-2d) The Wonders of Nature Unit 4 Do you remember where the deepest point in the ocean is? How deep is it? Mariana Trench. It’s about 11,000 metres deep. Can humans even reach there? Yes. The Fendouzhe from China reached the bottom of the Mariana Trench (10,909 meters) on November 10, 2020. It took 3 hours and 22 minutes. 2a What do you know about the deep sea? What is the infographic( 信息图表) about? What does each icon(图标) stand for? What do the numbers on the right mean? It’s about ocean depths. /depθ/ n.深(度);纵深 the Titanic Mount Qomolangma Fendouzhe a whale They mean the depths of the ocean. Depth of the ocean 2a Complete the sentences with the information from the picture. /rest/ v. 停留;搁置 /daɪv/ v.潜水 D A C B Now a class is asking Mr.Jone--- a deep-sea researcher some questions after his talk. What topics are they talking about? 2b where the deep sea begins why people are researching the deep sea which Chinese submersible dived deeper in the water than many others what deep-sea animals are like how everyone should protect the deep sea Listen and tick ( ) the topics they discuss. Circle the key words 2c Listen again. Complete the sentences with the facts from the conversation. People still don't know much about the ___________________. In ______, China's Fendouzhe dived into the deep sea and filmed it. Some animals have unusual abilities. Some are ______ but can "see". Some can even create their own ______. There is rubbish even at ________ metres deep. ocean floor/deep sea 2020 blind light 11,000 /ʌnˈjuːʒuəl/ adj.不寻常的 Listening tip: Find the key words. When you hear them, pay close attention — the answer is usually nearby. Choose and complete Ask about geography facts C B D A Think further 1. Why is it important to research the deep sea? • Curiosity: It is the largest part on earth, and we still don’t know much about it. • Amazing Life: It is home to unusual animals. • Protection: Human activities affect(影响) everywhere. We should do something about it and protect our home. 2. What can we learn from this conversation? First, we should be curious about the unknown world. Second, we should take pride in our country’s science and technology. China’s Fendouzhe shows our country’s great progress in deep-sea technology. What’s more , we have the duty to protect the ocean and fight against pollution. 2d Read the questions and think of more you would like to ask the deep-sea researcher. Research the answers. Then ask and answer the questions with a partner. What is the largest shark in the deep sea? What is the bottom of the deep sea like? Why is it important to research the deep sea? 4. What is the largest animal living in the deep sea? 5. What is the coldest temperature in the deep sea? 6. What do you think is the hardest problem in exploring the deep ocean? Get the answers on the Internet! /ˈbɒtəm/ n.底;底部 Suppose you are at a geography lecture, think of more you would like to ask the deep-sea researcher. Make up a conversation with your group members. Ask and answer geography facts Section A What is amazing about nature? • Talk about reasons: Why ...? ... is one reason. Because ... • Talk about features (特征) : What are ... like? ... are / can ... • Ask for more information and give an answer: Are there any other ... about ...? What else ...? There is / are ... • Ask for opinions: What do you think of ...? What should we do? I think ... We should ... • Talk about natural wonders: What is the ... in the world? It’s ... How ... is it? It’s ... Host:Thank you for the wonderful talk. Now, does anyone have any questions? Student 1: I do! Why ...? Student 2: ... is one reason. Because … Student 3: What are ... like? ... 用方框中所给单词或短语的适当形式填空 1 1. The exact ___________ of the room are 3 metres 20 by 2 metres 84. 2. The area of this national park is about 30,000 _________________. 3. Smoking is harmful to people's health _________ the environment. 4. Because of the interesting _________ of Asian life, The Travels of Marco Polo soon became well known. 5. Different ________ of books in the library are suitable for students of different ages. measurements square kilometres as well as description levels level description square kilometre measurement as well as 用括号中所给单词的适当形式填空 2 6. The _________ (deep) of the swimming pool for kids is 1.2 metres. 7. Nature lovers can enjoy a large number of natural ________ (wonder) in China. 8. Choosing the right pet is an important thing, so we spent time __________ (research) different animals before picking our new pet. 9. He was a(n) ________ (usual) man with great business talents. 10. Of all the mountains, Mount Qomolangma is the _________ (high) and the most famous. depth wonders researching unusual highest $