Unit 4 Lesson 1 Section A (1a-1d)（讲解课件）-【优翼·学练优】2025-2026学年八年级英语下册同步备课（人教版）

该初中英语课件围绕“自然奇观”主题，聚焦自然奇观词汇、地理事实及最高级与大数表达。课堂通过猜谜语（如瀑布相关）和图片分享（黄果树、维多利亚等瀑布）激活兴趣，再扩展到尼罗河、珠穆朗玛峰等奇观，结合听力补全测量数据，搭建从认知到运用的学习支架。 其亮点在于融合语言能力与思维品质，猜谜和图片分析培养观察与推断能力，听力训练提升信息获取技能，结对练习强化最高级和大数表达。融入中外自然奇观增强文化意识，帮助学生在真实语境中提升语言运用能力，教师可借助结构化活动高效开展教学。

Unit 4 The Wonders of Nature Section A What is amazing about nature? (1a-1d) Learning Objectives In this lesson you will: 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. Guess the Riddle I’m not a river, but I have lots of flowing water. I’m not a rain, but I drop from the sky. What am I? I have a lot of water but no legs to walk. I fall from high places but never get hurt. What am I? Look and Share Here are some famous waterfalls around the world. Can you identify what they are according to the given clues? in Guizhou China one of Asia’s largest waterfalls, with a width of about 101 meters and a height of around 77.8 meters Huangguoshu Waterfall on the Zambezi River(赞比西河) , between Zambia (赞比亚) and Zimbabwe(津巴布韦) in southern Africa one of Africa’s largest waterfalls, about 1,700 meters wide and up to 108 meters high Victoria Falls on the Churún River(丘伦河) , in the Guiana Highlands (圭亚那高原) of Venezuela(委内瑞拉) the world’s tallest waterfall, with a total drop of about 979 meters Angel Falls 1. Do you know the name of the waterfall in the photo? 2. What do you think is special about it? Victoria Falls. It is one of the largest waterfalls in Africa. It's very wide and has a huge flow of water. The mist from it can be seen from far away, and it's also located on the border between two countries. 3. What other natural wonders do you know? Natural wonders are amazing, unique things made by nature (not humans). They are often very big, beautiful, or special. Examples include huge waterfalls, high mountains, deep canyons(峡谷), or strange rock formations. These places usually surprise people with their natural power or beauty. Match the places with the pictures. ____ Nile River ____ Angel Falls ____ Mount Qomolangma ____ Dead Sea ____ Sahara Desert ____ Mariana Trench E F A D C B 1a Nile River 尼罗河 /naɪl/ What do you know about these natural wonders? the longest river in the world, about 6,650 kilometers long flow through 11 countries in Northeast Africa home to animals like Nile crocodiles, hippos, and Nile perch 鲈鱼 Mount Qomolangma 珠穆朗玛峰 /ˈtʃəʊməʊˌlɑːŋmə/ the highest mountain in the world, with an official height of about 8,848.86 meters on the border between Nepal and China. Dead Sea the lowest place on land one of the world’s saltiest bodies of water people can easily float on its surface without sinking Sahara Desert /səˈhɛrə/ the world’s largest hot desert, with an area of about 9.2 million square kilometers extremely hot and dry in summer and very little rainfall Mariana Trench 马里亚纳海沟 /ˌmɛriˈænə/ /trentʃ/ in the western Pacific Ocean, near the Mariana Islands the deepest part in the ocean Listen to the game show. Complete the descriptions of the places. Place Description Measurement Mount Qomolangma the _______________ in the world ___________meters high Sahara Desert the ______________ in the world about___________ square kilometers in size Dead Sea the _____________ on earth ___________meters below sea level Mariana Trench the _____________ in the ocean about ___________ meters deep highest mountain biggest desert lowest place deepest point 1b 416 8,848.86 11,000 9,000,000 Do you know how to read the following numbers? 416: four hundred and sixteen 8,848.86: eight thousand,eight hundred and forty-eight point eight six 11,000: eleven thousand 9,000,000: nine million e.g. 345,678,912: three hundred and forty-five million,six hundred and seventy-eight thousand, nine hundred and twelve How to read large numbers? Listen again. Complete the measurements in 1b with the numbers below. 416 8,848.86 11,000 9,000,000 Place Description Measurement Mount Qomolangma the _______________ in the world ___________meters high Sahara Desert the ______________ in the world about___________ square kilometers in size Dead Sea the _____________ on earth ___________meters below sea level Mariana Trench the _____________ in the ocean about ___________ meters deep highest mountain biggest desert lowest place deepest point 8,848.86 9,000,000 416 11,000 1c Listening Scripts 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? Listen and repeat. Pay attention to the expressions in bold. 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? /ˌtækləˈmɑːkæn/ 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! Useful Expressions What’s the highest mountain/ the biggest desert/the lowest place/... in the world? How high/big/deep/...is it? Pair Work 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 ... 1d Language Points 1. What other natural wonders do you know? wonder 在此处作可数名词，意为“（自然/人造）奇观” e.g. The Great Wall is one of the wonders of the world.（长城是世界奇观之一。） wonder 还可以作不可数名词，意为“惊讶；疑惑” e.g. The children looked at the magician in wonder.（孩子们惊奇地看着魔术师。） no wonder：难怪；不足为奇 e.g. You’ve been studying all day—no wonder you’re tired.（你一整天都在学习，难怪会累。） wonder 还可以作动词，意为“想知道；好奇；疑惑” e.g. She wonders why he didn’t call her yesterday. （她疑惑他昨天为什么没给她打电话。） I wonder what time the train will arrive. （我想知道火车什么时候到。） 2. Its surface is 416 metres below sea level. below 作介词时，强调 “位置、数值、等级等处于另一事物的下方或更低水平”，不强调 “垂直正下方”（对应的反义词为above） 。也可用于抽象概念（如温度、排名、标准） below sea level 意为“低于海平面” e.g. The Dead Sea is one of the few places on Earth that is below sea level.（死海是地球上少数几个低于海平面的地方之一。） The river below the bridge is very clear. （桥下面的那条河很清澈。） 本文件著作权为创作公司所有, 仅限于教师教学及其他非商业性和非盈利性用途。如发现盗用、转卖、网络传播等侵权行为, 本公司将依法追究其相应法律责任。 部分素材选自网络, 如有争议, 请联系删改。 声 明 Lavf57.71.100 Packed by Bilibili XCoder v2.0.2 101435.555 97595.18 $