Unit4 Section A (1a-2d) 课件 2025-2026学年人教版英语八年级下册

Section A (1a-2d) Made by Qianmo-studio The Wonders of Nature Unit 4 1 learning objectives 1.learn the words and expressions about some famous natural wonders. 2.get the geography facts about the natural wonders through listening. 3.talk about these places using the superlatives and large numbers. Read these words. wonder n.奇观；惊叹 v.琢磨；想知道 measurement n.数量；测量 square kilometre 平方干米 below prep.在......下面；低于 adv.在(或到)......下面 level n.高度；水平；程度 surface n. 表面；表层 Nile River 尼罗河 Angel Falls 天使瀑布 Mount Qomolangma 珠穆朗玛峰 Dead Sea 死海 Sahara Desert 撒哈拉沙漠 Mariana Trench 马里亚纳海沟 New words Do you know these natural wonders in the world? /ˈwʌndə(r)/ n. 奇观；惊叹 Angel Falls Mariana Trench Dead Sea Mount Qomolangma Sahara Desert Nile River 珠穆朗玛峰 ['tʃəʊməʊˌlɑ:ŋmə] [naɪl] 尼罗河 [sə'hɑ:rə] 撒哈拉沙漠 死海 马里亚纳海沟 /ˌmæriˈɑːnə/ 安赫尔瀑布 Presentation Match the places with the pictures. 1a ____ Nile River ____ Angel Falls ____ Mount Qomolangma ____ Dead Sea ____ Sahara Desert ____ Mariana Trench E F A D C B Pre-listening What's the highest mountain in the world? Qomolangma. How high is it ? It's 8,848.86 meters high. Presentation Where's the deepest point in the ocean? The Mariana Trench. How deep is it? It's about 11,000 metres deep. Presentation What's the longest river in the world? The Nile River. How long is it ? It's 6,671 kilometers in length. It's 6,671 kilometers long. Presentation What's the biggest desert in the world? The Sahara Desert. How big is it ? It's about 9,000,000 square kilometers in size Presentation What's the lowest place on earth? The Dead Sea How low is it ? Its surface is 416 metres below sea level. Presentation Can you read these numbers? 6,671 9,600,000 8,844.43 six thousand, six hundred and seventy-one eight thousand, eight hundred and forty-four point four three nine million, six hundred thousand 1,025 one thousand and twenty-five Presentation 1: 1—12: (记住每个单词) 2: 13—19: -teen (thir-, fif-, eigh-) 3: 20—90: -ty (twen-, thir-, for-, fif-, eigh-) 4: 21—99: 十位 _ 个位 5: 100, 200, ... 900: _______ hundred 6: 101—999: _______ hundred and __ 个位 十位 __ _ 个位 小结: 7: 多位数: ______ billion (十亿), ______ million (百万), _____ thousand, ______ hundred and 个位 十位 __ _ 个位 _ Language points 8,850 5,000 6,300 1,025 8844.43 5,464 6,671 9,600,000 300 接龙 幻灯片上数字出现时，同学应迅速读出。 每人一个，按行/列依次接龙，5秒内说不出，此行/列同学即失去此答题机会，下一行/列同学接续。 Practice 1. 长、宽、高、深、面积的表达方法 The river is 20 meters wide. = The river is 20 meters in width. 基数词 + 单位词 + 形容词（long, wide, high, deep等） 基数词 + 单位词 + in + 名词（length, width, height, depth, size等） 【拓展延伸】作定语时用合成词“数词 - 单位词单数 – 形容词”。 This 20-meter-long rope isn’t long enough to help climb the mountain. Language points 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 听力技巧：听主旨，抓描述性最高级词汇（highest, largest...） highest mountain biggest desert lowest place deepest point 1b While-reading Listen again. Complete the measurements. Place Measurement Mount Qomolangma ________metres high Sahara Desert about ________square kilometres in size Dead Sea ________metres below sea level Mariana Trench about________metres deep 听力技巧：精听，边听边记录关键数据。 8,848.86 9,000,000 416 11,000 1c While-listening Host: Welcome to our game show! Today, it’s all about geography. Answer as quickly as you can! Question one: What is the highest mountain in the world? Fu Xing: It's Mount Qomolangma. Host: Correct! How high is it? Liu Hongyu: I know this—it's 8,848.43 metres high. Host: No, sorry, Fu Xing? Fu Xing: Is it 8,848.86 metres? Host: Yes! But some scientists say Qomolangma is still growing taller! Now, name the biggest desert in the world. Fu Xing: The Taklimakan Desert? Host: Wrong! Ella? Ella: It's the Sahara Desert. Host: Right! Now, how big is it? Ella: It's about 9,000,000 square kilometres. Host: That's right! What's the lowest place on earth? Liu Hongyu: It's the Dead Sea! Host: Well done! Its surface is 416 metres below sea level. Now where's the deepest point in the ocean? Fu Xing: It's in the Mariana Trench, Host: That's correct! How deep is it? Fu Xing: It's about 11,000 metres deep. Host:Correct! Listening Scripts Listen and repeat. Pay attention to the expressions in bold. /ˌtækləˈmɑːkæn/ Pre-listening Pair work. Talk about the places you have learnt about. For example: A: What’s the highest mountain in the world? B: It’s Mount Qomolangma. A: How high is it? B: It’s 8,848.86 metres high. 1d Pre-listening 词汇练习 Exercise 1. The Great Pyramid is a great ___________ (奇观) of the ancient world. 2. We need to get the exact _____________ (测量数据) of the room before buying the carpet. 3. The temperature today is five degrees ___________ (低于) zero. 4. The water __________ (水平面) in the lake is rising because of the heavy rain. 5. The _________ (表面) of the moon is covered with dust and rocks. 6. Mount Qomolangma is the _________ (high) mountain in the world. 7. The Sahara is by far the __________ (large) hot desert on Earth. 8. What’s the __________ (deep) point in the ocean? — It’s the Mariana Trench. 9. Scientists use special tools for the __________ (measure) of the trench’s depth. 10. We looked at the stars and __________ (wonder) if there is life in space. wonder measurement below surface level highest largest deepest measurement wondered 单项选择 Exercise 1. How do you read the number “8,848.86” in English? A. Eight thousand eight hundred and forty-eight point eight six. B. Eight thousands eight hundred forty-eight point eighty-six. C. Eight thousand and eight hundred forty-eight point eight six. 2. The Dead Sea is about 430 meters _______ sea level. A. under B. below C. down 3. — _______ is the Nile River? — It’s about 6,650 kilometers long. A. How much B. How deep C. how long 4. The Yangtze River is one of _______ rivers in Asia. A. long B. longer C. longest D. the longest A B A D 1. Fendouzhe reached ______________. 2. The deep sea begins at ______________. 3. The Titanic rests at ____________. 4. A whale can dive to _________________. 潜水 10,909 metres 200 metres 3,800 metres over 2,000 metres What do you know about the deap sea? Complete the sentences with information from the picture. 2a /depθ/ n. 深（度）；纵深 Pre-listening □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 潜水艇 A class is asking a deep-sea researcher some questions after his talk. Listen and tick the topics they discuss. 2b While-listening 1. People still don’t know much about the                         . 2. In                       , China’s Fendouzhe dived into the deep sea  and filmed it. 3. Some animals have unusual abilities. Some are                       but can “sea”. Some can even create their own                     . 4. There is rubbish even at                   metres deep. 2020 ocean floor blind  light 11,000 Listen again. Complete the sentences with the facts from the conversation. 2c While-listening Ms Gao: Thank you for the wonderful talk, Mr Jones. Now, does anyone have any questions? Emma: I do! Why are so many countries researching the deep sea? Mr Jones: Well, curiosity is one reason. We don't know enough about the ocean floor. Fu Xing: I remember that in 2020, China's Fendouzhe dived deeper into the Mariana Trench than many other submersibles in the world and filmed it. But I didn't see any deep-sea animals. What are they like? Mr Jones: Well, many deep-sea animals are large and unusual. Some animals are blind, but they can "see" as well as others. Some even create their own light! Peter: Cool! Are there any other surprising facts about the deep sea? Mr Jones: Did you know that there's rubbish even at 11,000 metres deep? That shocked many people. Ms Gao: That's terrible! We should do something about it. Mr Jones: You're right! Post-listening 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? 在……的底部 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. 2d While-listening Words: 1. wonder n. 奇观；惊叹 v. 琢磨；想知道；感到诧异— wonderful adj. 精彩的；绝妙的 2. measure v. 测量；量度为—measurement n. 数量；测量 3. deep adj. 深的；有……深的—depth n. 深(度)；纵深 4. research v. & n. 研究；调查—researcher n. 研究者 5. usual adj. 通常的—unusual adj. 特别的；不寻常的— usually adv.通常地 Phrases: 1. on earth 在地球上 2. square kilometre 平方千米 3. below/above sea level 低于/高于海平面 4. dive into the deep sea 潜入深海 5. the bottom of …… 的底部 Summary Mount Qomolangma is the (high) mountain in the world. We were all (shock) to hear that there is rubbish at the bottom of the ocean. The (deep) of the Mariana Trench is about 11,000 metres. Curiosity is one of the (reason) why people explore the deep sea. Many deep-sea animals look (usual) and have special abilities. highest shocked depth reasons unusual 用单词的适当形式填空 Exercises 1. Mount Qomolangma is _______ mountain in the world. A. high B. higher C. the highest D. tallest 2. The Dead Sea is 416 metres _______ sea level. A. below B. under C. on D. in 3. They _______ many photos in the deep sea last year. A. take B. took C. takes D. are taking 4. It’s important _______ the deep sea. A. learn B. to learn C. learning D. learns 5. We don’t know much _______ the ocean floor. A. about B. with C. for D. at 单项选择 C A B B A Exercises Review the new words and expressions. Retell 2c. Homework Homework null 18528.0 Blues 4884.9087 Blues 4310.2124 Blues 4780.4185 null 110422.555 null 97647.43 null 60916.37 $