Unit 4 Section A（1a-1d）（同步教学课件） 2025-2026学年八年级英语下册同步教学精品课件（新教材人教版）

该初中英语课件围绕“自然奇观”主题，涵盖核心词汇（如wonder、measurement）、形容词最高级、数字读写及长/宽/高/深表达等语言点。课堂从展示维多利亚瀑布等图片导入，通过问答激活已知，经1a图片匹配过渡到听力活动，搭建从认知到应用的学习支架。 其亮点在于融合语言能力（听力填空提取信息、角色扮演提升表达）、思维品质（判断正误分析文本逻辑）和学习能力（归纳数字规则、小组合作探究）。采用任务型教学，学生在真实语境中提升语言运用与思维能力，教师可借助结构化活动高效落实教学目标。

Section A 1a-1d Unit 4 The Wonders of Nature Learning Aims 语言能力 文化意识 思维品质 学习能力 掌握climber、determined等登山相关核心词汇及扫读策略，能提取文本关键信息、进行简单口语讨论。 学会运用扫读、合作探究等学习方法，提升自主学习与互助交流能力，养成良好阅读习惯。 通过梳理文本脉络、分析探险精神，培养逻辑归纳与深度思考能力。 了解中国登山队攀登珠峰的壮举，增强民族自豪感，树立敬畏自然、勇于探索的理念。 Let’s enjoy some natural wonders of the world. Do you know the name of the waterfall in the photo? What do you think is special about it? What other natural wonders do you know? Look and share The waterfall in the photo is Victoria Falls. It is one of the largest waterfalls in the world. Mount Qomolangma, Huangguoshu Waterfall,The Grand Canyon ... 2. It is one of the largest waterfalls in the world by width (about 1.7 km) and volume of water. The mist from the falls can be seen from over 50 km away, and the sound of the water is extremely loud. It is a UNESCO World Heritage Site and sits on the border between Zambia and Zimbabwe. 3. Here are some famous natural wonders from around the world: The Grand Canyon (USA): A massive gorge carved by the Colorado River. The Great Barrier Reef (Australia): The world’s largest coral reef system. Mount Everest (Nepal/China): The highest mountain on Earth. The Northern Lights (Aurora Borealis) (Arctic regions): A spectacular natural light display in the sky. The Amazon Rainforest (South America): The world’s largest tropical rainforest. Angel Falls Nile River 天使瀑布：位于委内瑞拉东南部的Auyán-tepuí山上，卡罗尼河的一条源流上，高达3212英尺（979米）的瀑布，是世界上最高的瀑布。 Angel Falls（安赫尔瀑布） 位置：位于委内瑞拉东南部玻利瓦尔州的卡奈马国家公园（UNESCO 世界遗产），圭亚那高原的奥扬特普伊山（Auyán-tepui），流经丘伦河（Churún River）。 数据：世界最高的不间断瀑布，总落差979 米，主落段达807 米；底部宽约 150 米。 命名与探访：以 1933 年发现它的美国飞行员Jimmie Angel命名；周边雨林茂密，陆路难达，多靠小飞机空中观赏或乘船接近；6–12 月为丰水期。 Mount Qomolangma Sahara Desert Dead Sea Mariana Trench 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 Listen to the conversationand think about the questions below. 1.What is the latest measured height of Mount Qomolangma? A. 8,848.43 metres B. 8,848.86 metres C. 8,844.43 metres D. 8,844.86 metres 2.How large is the Sahara Desert in size? A. About 900,000 square kilometres B. About 9,000,000 square kilometres C. About 90,000,000 square kilometres D. About 900,000,000 square kilometres 3.How deep is the Mariana Trench? A. About 416 metres B. About 8,848.86 metres C. About 11,000 metres D. About 9,000,000 metres Host: Welcome to our game show! Today, it's all about geography. Answer as quickly as you can! Question one: What is the __________ mountain in the world? Fu Xing: It's Mount Qomolangma! Host: Correct! How high is it? Liu Hongyu: I know this—it's____________ metres high. Host: No, sorry. Fu Xing? Fu Xing: It is_____________metres! Host: Yeah! But some scientists say Qomolangma is still growing _________Now, name the __________ 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 ____________square kilometres. Host: That's right! What's the __________ place on earth? Liu Hongyu: It's the Dead Sea! Host: Well done! Its surface is __________ metres below sea level. Now where's the __________ 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_____________metres deep. Host: Correct! 8,848.43 8,848.86 9,000,000 11,000 taller highest biggest lowest deepest 416 Listen to the conversation again and fill in the blanks 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 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 平方千米 低于海平面 measurement: n. 数量；测量 Comprehension check.  1. Mount Qomolangma is the highest mountain. 2. It is 8,848.43 metres high. 3. The Sahara Desert is the biggest desert. 4. The Dead Sea is 416 metres above sea level. 5. The Mariana Trench is about 11,000 metres deep. T F T F T 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. Listen and repeat. Then role-play the conversation. 世界上最高的山是哪座？ 它有多高？ 说出世界上最大的沙漠。 塔克拉玛干沙漠 15 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! 地球上最低的地方是哪里？ 海洋中最深的地方在哪里？ 16 Talk about the places you have learnt about. 1d Work with your partner and talk about the following questions. What is the largest island on earth? What is the longest river in China? What is the biggest / smallest country in the world? What is the deepest trench in the ocean? What is the biggest desert in Africa? What's the highest mountain in the world? What's the biggest desert in the world? What's the lowest place on earth? Where's the deepest point in the ocean? How high is it? How big is it? How low is it? How deep is it? It's Mount Qomolangma. It's the Sahara Desert. It's the Dead Sea. It is in the Mariana Trench. It is about 8,848.86 metres high. It is about 9,000,000 square kilometres in size. Its surface is 416 metres below sea level. It is about 11,000 metres deep. Language points Point 1 about 9,000,000 square kilometres in size. 面积约 900 万平方千米 。 ① square metre/mile 平方米 / 英里 ② square [名词] 广场；正方形 我们的工厂占地 5 平方千米。 Our factory covers an area of five___________________. square kilometres 请在纸上画一个正方形。 Please draw __________ on the paper. a square Point 2 What other natural wonders do you know? wonder /ˈwʌndə(r)/n. 奇观；惊叹 v. 琢磨；想知道；感到诧异 高频 1. n.[C] 奇观；奇迹 The Grand Canyon is one of the natural wonders of the world. 科罗拉多大峡谷是世界自然奇观之一。 The Great Wall is one of the wonders of the world. 长城是世界奇观之一。 2.wonder 还可以作不可数名词，意为“惊讶；疑惑” The children looked at the magician in wonder. 孩子们惊奇地看着魔术师。 2. v. 琢磨；想知道（相当于 want to know） If you study physics, you wonder why light travels faster than sound. 如果你学习物理，你会想知道为什么光比声音传播速度快。 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。 3. v. 感到诧异 I wondered at her beautiful singing. 她优美的歌声让我惊讶。 4.no wonder：难怪；不足为奇 in wonder 惊奇地 You’ve been studying all day—no wonder you’re tired. 你一整天都在学习，难怪会累。 1. The pyramids in Egypt are one of the most famous ___________ (wonder) of the ancient world. 2. I _________ (wonder) if you could help me solve this math problem. We looked at the beautiful sunset in __________ (wonder). 3. He ____________ (wonder) why the sky turned red just now. wonders wonder wonder wondered Point 3 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”，但不一定是在正下方（对应的反义词为above）。 under表示在某物的正下方 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。） level /ˈlevl/ n. 高度；水平；程度 高度 sea level 海平面 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。） 水平；程度 常与介词 of 连用。 a high/low level 高 / 低水平 As long as we keep working, we will achieve higher levels. 只要我们继续努力，我们会达到更高的水平。 below 作介词，意为“在……下面；低于；少于”。 There is a beautiful garden below our window. 在我们窗户下面有一个漂亮的花园。 The sun sank below the horizon. 太阳落到了地平线以下。 His score on the test was below 60. 他这次考试的分数低于60分。 The river below the bridge is very clear.（桥下面的那条河很清澈。） Point 4 英文数字读写规则 三位数及以内的数字直接按数字本身进行读写; 三位数以上的数字从右往左，每三位用逗号分隔，形成分级单位，依次为千(thousand)、百万(milion)、十亿(biion)等。 读百位及以内的数字时，通常会在百位和十位之间加一个and ;但在千位和百万位之间、百万位和十亿位之间不需要加and。 小数点后无论有多少位数，中间都不插入逗号。小数点读作point，其后各位数字(包括0)需要逐个读出。 Point 5 形容词 / 副词最高级变化规则 big — biggest fat — fattest thin — thinnest 重读闭音节词词尾只有一个辅音字母时，先双写该辅音字母，再加-est beautiful — most beautiful interesting — most interesting delicious — most delicious 多音节词和部分双音节词在词前加most 不规则变化 原级 最高级 good / well best bad / badly worst many / much most little least far farthest furthest 26 What is the highest mountain in the world? What is the biggest desert in the world? What is the lowest place on Earth? Where is the deepest point in the ocean? 形容词最高级用法 构成： 单音节词：high → highest, big → biggest, low → lowest, deep → deepest 多音节词：interesting → the most interesting 规则： 最高级前必须加 the：the highest mountain, the biggest desert 常与表示范围的短语连用：in the world, on Earth, in the ocean Point 6 about 11.000 metres deep 深约11000米 关于长、宽、高、深的表达： (1) 基数词+单位词+形容词 (long, wide, tall, high, deep等) 10 metres long 10米长 15 meters wide 15米宽 200 metres deep 200米深 (2) 基数词+单位词+in+名词 (length width, height, depth 等) 10 metres in length 10米长 15 meters in width 15米宽 200 metres in depth 200米深 高度：It’s 8.848.86 metres high. 面积：It’s about 9,000,000 square kilometres in size. 低于海平面：It’s 416 metres below sea level. 深度：It’s about 11,000 metres deep. 28 (3) 对长、宽、高等提问用疑问词how。 How long/high/wide ...? ……多长/高/宽？ How wide is this river? 这条河有多宽？ How long is the Great Wall of China? 中国的长城有多长？ 物体长、宽、高、深等的表达法 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等） Point 7 Deepest dive of a whale 鲸鱼下潜的最大深度 ① dive /daɪv/v. & n. 潜水；跳水；俯冲 ② [不及物动词] 潜水；跳水；俯冲 dive down 潜入；下潜；俯冲 dive into 跳入；跳进 ③ [名词] 潜水；跳水；俯冲 那个男人跳入河中去救溺水的小孩。 The man _____________ the river to save the drowning child. dived into 他做了个漂亮的跳水动作。 He made_____________________. a beautiful dive Exercises 单项选择 一、单项选择 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 A B 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 D 二、根据括号内提示完成句子 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. wonder measurement below surface level 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. highest largest deepest measurement wondered 三. 用方框中所给词的适当形式填空 四. 完成译句 (每空一词)。 1.这个湖有多深? _______ _________ is the lake? 2.请尽可能快地完成作业! Please finish your homework_______ ____________ _______ you can! 3.地球上最深的点是哪里? Where’s ________ ____________ __________ on earth? 　point     　deepest     　the     　quickly as     　as     　How deep     35 本课句型 Summary 我都 学会了! Key words Expression wonder, desert, measurement, below, level, surface square kilometre,sea level What's the highest mountain in the world? What's the biggest desert in the world? What's the lowest place on earth? Where's the deepest point in the ocean? Sentences Basic (必做) 听录音，跟读模仿本课听力文本。 Improving(选做) 2.用英语写一段 50 词左右的短文，介绍你最感兴趣的一个自然奇观。 Extend (选做) 3.以“The most amazing place I want to explore”为题，录制一段2分钟英文解说视频，并尝试解释原因。 Homework Thank you ! null 120323.93 101435.555 97595.18 null 102585.055 $