Unit 4 Section A 1a-1d 课件 2025--2026学年人教版八年级英语下册

该初中英语课件围绕“自然奇观”核心主题，涵盖地理事实描述、大数字表达及比较级运用等知识点。课堂导入通过标题图片预测与“人与自然联系”讨论建立知识关联，以词汇预习、地名解析、数字读法分层教学（三位数到多位数）为学习支架，帮助学生逐步掌握目标内容。 其亮点在于融合语言能力与思维品质培养，通过听力抓关键信息（如最高级词汇）、对话填空情境应用提升语言理解与表达，借助自然奇观数据比较（如珠峰高度、死海海拔）发展分析能力。配套音频跟读与分层练习，助力学生夯实基础，教师可直接利用系统活动设计高效开展教学。

Presentation Unit4 The Wonders of Nature Section A What is amazing about nature (1a-1d) Presentation Look and predict Title Picture + What do you think this unit will talk about? The Wonders of Nature Presentation Discuss and say learn about nature use nature wisely respect nature protect nature enjoy nature ... connect with nature Discuss: How do we connect with nature? In this unit, you will: 1. talk about geography facts about natural wonders. 谈论有关自然奇观的地理事实。 2. compare facts about famous places. 对比著名景点的相关信息。 3. share geography facts using large numbers. 使用大数字来分享地理事实。 4. explore how and why people connect with nature. 探讨人类与自然如何建立联系,以及为何会产生这种 联系。 4 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 尼罗河在非洲,是世界最长河流,长约 6670 千米,滋养沿岸土地,被称为非洲 “母亲河”。 Nile/na l/ river 尼罗河 天使瀑布:位于委内瑞拉东南部的Auy n-tepu 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(Auy n-tepui),流经丘伦河(Chur n 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。 在委内瑞拉,是世界最高瀑布,落差 979 米,藏身热带雨林,水流从高山直坠而下,景色壮观。 Angel Falls 安赫尔瀑布 / e n.d l f lz/ 天使瀑布:位于委内瑞拉东南部的Auy n-tepu 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(Auy n-tepui),流经丘伦河(Chur n 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。 位于中尼边境,是世界最高峰,海拔 8848.86 米,山体巍峨,被称为 “世界第三极”。 Mount Qomolangma (珠穆朗玛峰) /ma nt t .m .l .m / 位于非洲北部,是世界最大沙漠,面积约 900 万平方公里,气候干旱,以广袤沙丘为特色 Sahara Desert(撒哈拉沙漠) /s h r dez t/ 死海位于西亚,是世界陆地最低点(-416 米),湖水盐度极高,无生物生存,人可漂浮于湖面。 Dead Sea (死海) 位于西太平洋,是世界最深海沟,最深处约 11000 米,海底环境极端,藏有独特海洋生物。 Mariana Trench 马里亚纳海沟 / meri n trent / _Nile River _Angel Falls _Mount Qomolangma _Dead sea _Sahara Desert _Mariana Trench F A D C E B 马里亚纳海沟 安赫尔瀑布 尼罗河 B E C F D A What’s amazing about each place? 课本P32 1a Match the places with the pictures. 珠穆朗玛峰 死海 撒哈拉沙漠 Natural wonders 自然奇观 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 416 三位数 读法 four hundred and sixteen five hundred and nine 509 三位数:百位数字 + hundred + and + 十位和个位(十位若是0,直接读个位) _ hundred and 个位 十位 _ _ 个位 _ 8,848.86 四位数 读法 thousand eight hundred and forty-eight point(点) eight six 小数部分逐个读出数字 读法:eight thousand, eight hundred and forty-eight point eight six 四位数:千位数 + thousand + 后面三位数(小数部分逐个读出数字) _ thousand, _ hundred and 个位 十位 _ _ 个位 _ 五位数读法 11,000 eleven thousand 259,613 two hundred and fifty-nine thousand, six hundred and thirteen 六位数读法 9,000,000 nine million 七位数读法 million (百万) thousand 第一个逗号代表thousand(千) 第二个逗号代表 million(百万) Presentation Look and read Can you read these numbers? 百 百万 千 十亿 two billion ,sixty-five million, six hundred and nine thousand, nine hundred and eighty point three four. 点 billion million thousand hundred point 2, 065, 609, 980. 34 billion million thousand point three four and 大数字读法:从右往左,三位一截;每截都按三位数读;截完加单位:billion (十亿) / thousand(千) / million(百万), ;and 用在百十间 Presentation 8,848.86 eight thousand, eight hundred and forty-eight point eight six 416 11,000 9,000,000 four hundred and sixteen eleven thousand nine million Look and read 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 While-listening 1b Presentation 1c Listen again. Complete the measurements in 1b with the numbers below. Listen and complete 416 8,848.86 11,000 9,000,000 Place Measurement Mount Qomolangma _metres high Sahara Desert about _square kilometres in size Dead Sea _metres below sea level Mariana Trench about_metres deep /'me m nt/ n.数量;测量 8,848.86 9,000,000 416 11,000 Tip: 精听,边听边记录关键数据,用逗号三位一隔 Presentation Read and fill Read the conversation and fill in the blanks. Host:Welcome to our game show! Today, it's all about . Answer ! Question one: What is the mountain in the world? Fu Xing:It's Mount Qomolangma! Host:Correct! 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 taller! Now, name the biggest in the world. Fu Xing:The Taklimakan Desert? Host:Wrong! Ella? Ella:It's the Sahara Desert. Host:Right! Now, is it? Ella:It's about 9,000,000 . Host:That's right! What's the place on earth? Liu Hongyu: It's the Dead Sea! Host:Well done! Its is 416 metres below . Now where's the deepest point in the ocean? Fu Xing:It's in the Mariana Trench. Host:That's correct! is it? Fu Xing:It's about 11,000 metres deep. Host:Correct! geography as quickly as you can highest How high growing desert how big square kilometres lowest surface sea level How deep 地理 尽可能快地 最高的 有多高 生长 / 增高 沙漠 有多大 平方千米 最低的 表面 海平面 有多深 Language points 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 2. The Wonders of Nature 自然奇观 1)wonder n.奇观;惊叹 (可数) / v. 琢磨;想知道(相当于want to know);感到诧异 2).no wonder:难怪;不足为奇 3)in wonder 惊奇地 Language points 3. 长、宽、高、深、面积的表达方法 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) 练习:The building is about 200 metres high. (改为同义句) The building is about 200 metres _ _. 【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. in height 23 4. 416 metres below sea level 低于海平面416米 (3)【副词】在下面;低于 不强调垂直的“下面 e.g. From the top of the mountain, I could see the village below. 从山顶上我可以看到下面的村庄。 below 表示在某物的下方, 但不一定是在正下方, 反义词是above Write the answers below each question. 把答案写在每个问题的下面。 under 表示在某物的正下方,反义词是over The farmer is standing under the tree. 那个农民正站在树下。 辨析:below与under两者都表示“在……下面”。区别如下: 24 5. 416 metres below sea level 低于海平面416米 (1)【名词】高度 搭配:sea level 海平面 e.g. The mountain is over 3,000 metres above sea level. 这座山海拔3 000 多米。 (2)【名词】水平;程度 常与介词of连用。a high/low level 高/低水平 e.g. 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。(河北中考) 练习:The Dead Sea is the _ (low) place on the Earth, sitting 430 meters _ sea level. lowest below 25 6. B: Its surface is… metres below sea level. 它的表面低于海平面....米。 surface n. 表面;表层 当指“水面”或“液面”时,常用单数形式。 e.g. Nearly 10% of the earth’s surface is covered by ice. 地球表面将近10% 被冰覆盖。 拓展:on the surface 表面上;从外表看;乍一看 e.g. On the surface, it seems to be my fault. 表面上看,这似乎是我的过错。 练习:地震是地球表面的突然震动。 A(n) earthquake is a sudden shaking of the earth’s _. surface 26 Presentation 7. 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. Presentation 1d Look and talk Talk about the places you have learnt about. Useful expressions: 主语+谓语(+the)+最高级+ in/of/among短语. 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 ... n. 表面;表层 1d Talk about the places you have learnt about. It's ... What's the lowest place on earth? Its surface is ... metres below sea level. How low is it? Now, what's ... 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. Presentation Summarize the wonders of nature. the wonders of nature Mount Qomolangma the highest Sahara Desert the biggest Dead Sea the lowest Mariana Trench the deepest Nile River Angel Falls Mount Qpmolangma Dead Sea Sahara Desert Mariana Trench 8,848.86米高 11,000米深 9,000,000平方千米大小 低于/高于海平面 尽你所能快 做得好! 在....的表面 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 8,848.86 meter high/in height 11,000 meter deep / in depth 9,000,000 square kilometres in size below/above sea level as quickly as possible=as quickly as you can well done! on the surface of... Key Phrases Presentation 一、根据句意和汉语提示写出所缺单词。 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 Presentation 1. 词汇巩固:抄写本课核心活动词汇及重点句型,每个2遍,并确保会读会写。 2. 听力跟读:听读教材1b部分录音,模仿语音语调。 null 18528.0 null 110422.555 $