Unit 4 Section A 2a-2d（课件）2025-2026学年人教版英语八年级下册

Unit 4 The Wonders of Nature Section A 2a–2d Think and share. • What’s the highest mountain in the world? How high is it? • Where’s the deepest point in the ocean? How deep is it? What else do you know about the deep sea? It’s Mount Qomolangma and it’s 8,848.86 metres high. It’s in the Mariana Trench and it’s about 11,000 metres deep. 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 Look and share Do you know the name of the waterfall in the photo? It’s Victoria Falls. What do you think is special about it? Large and wide 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. 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 Look and share What other natural wonders do you know? /ˈnætʃrəl ˈwʌndəz/ Natural wonders are amazing, unique things made by nature (not humans). They are often very big, beautiful, or special. 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 ____Nile River ____Angel Falls ____Mount Qomolangma ____Dead sea ____Sahara Desert ____Mariana Trench Match the places with the pictures. 1a 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 below the sea level 珠穆朗玛峰 死海 撒哈拉沙漠 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 Pre-listening Today let’s join a game show. I’m the host. Can you guess what it is about? Geography challenge 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 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 highest mountain biggest desert lowest place deepest point Listen to the game show. Complete the descriptions of the places. 1b What do you know about these wonders? How high is Mount Qomolangma? 8,848.86 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 Do you know how to read the words? Let’s review 416 8,848.86 11,000 9,000,000 Let’s read the numbers! 大数字读法： 从____往____，_____位一截 每截都按三位数读 截完加单位：___________/ _______/________ ______ 用在百十间 右 左 三 and thousand million billion 大数字读法：从右往左数，每三位为一个区间用逗号隔开，分别读thousand千（4位数）,million百万（七位数）,billion十亿（10位数）;百位和十位之间and连接，小数点读point. 英语中没有万、亿 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 8,848.86 Do you know how to read the large numbers? Let’s learn thousand point eight six and 8,848.86: eight thousand,eight hundred and forty-eight point eight six 416 11,000 9,000,000 million four hundred and sixteen eleven thousand nine million Let’s read the numbers! 416 8,848.86 11,000 9,000,000 416 三位数 读法 four hundred and sixteen 367 three hundred and sixty seven 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） 416 8,848.86 11,000 9,000,000 8,848.86 四位数 读法 thousand eight hundred and forty-eight point eight six 小数部分逐个读出每个数字 读法：eight thousand eight hundred and forty - eight point eight six Let’s read the numbers! 416 8,848.86 11,000 9,000,000 四位数 读法 5,961.37 five thousand, nine hundred and sixty-one ，point three seven 四位数：千位数 + thousand + 后面三位数（小数部分逐个读出数字） Let’s read the numbers! 416 8,848.86 11,000 9,000,000 五位数读法 11,000 eleven thousand 259,613 two hundred and fifty-nine thousand ，six hundred and thirteen Let’s read the numbers! 六位数读法 9,000,000 nine million 七位数读法 million thousand 十位数读法 9,876,543,200 thousand 千 million 百万 billion 十亿 从左往右，第一个逗号读thousand,第二个逗号读million,第三个逗号读billion。 nine billion,eight hundred and seventy-six million, five hundred and forty-three thousand,two hundred 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 Listen again. Complete the measurements. 1c Place Measurement Mount Qomolangma ________metres high Sahara Desert about ________ square kilometres in size Dead Sea ________metres below sea level Mariana Trench about________metres deep 8,848.86 9,000,000 416 11,000 Learning tip: 长、宽、高、深、面积的表达方法: 基数词 + 单位词 + 形容词（long, wide, high, deep等）/介词短语（in size, below sea level等） 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 Host: Welcome to our game show! Today, it's all about geography. Answer as quickly as you can! Question one: ________________________ in the world? Fu Xing: It's Mount Qomolangma! Host: Correct! ________________? Lin 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, ________________________ in the world. Fu Xing: The Taklimakan Desert? Host: Wrong! Ella? Listen and fill What is the highest mountain How high is it name the biggest desert What questions did the host ask? 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 Ella: The Sahara Desert. Host: Right! Now, ______________? Ella: It's about 9,000,000 square kilometres. Host: That's right! ______________________on earth? Lin Hongyu: It's the Dead Sea! Host: Well done! Its surface is 416 metres below sea level. Now ___________________________ in the ocean? Fu Xing: It's in the Mariana Trench. Host: That's correct! _________________? Fu Xing: It's about 11,000 metres deep. Host: Correct! how big is it What's the lowest place where's the deepest point How deep is it Listen and fill -What is the highest/biggest/lowest/deepest...in the world/ on earth/in the ocean? 、、、的最、、、 -It’s... -How high/big/deep/long is it?有多高/大/深？ -It’s about.../ Its surface is... 大约是、、、 Pair-work Talk about the places you have learnt about. 1d 8,848.86 9,000,000 416 11,000 6,650 kilometers long 979.6 meters high 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 ... 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 You all did a great job in geography challenges! Here comes a deep-sea researcher. Let’s welcome and learn more! Are you interested in the world in the deep sea? Let’s have a look! 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 strange fish What do you know about the deep sea? submarines can reach Let’s share cold dark /ˈsʌbməˌrinz/ Fendouzhe is China's manned deep-sea submersible, which reached a depth that set a new record for China's deep-sea diving. Complete the sentences with the information from the picture. Do you have any questions? (1) Fendouzhe reached ____. (2) The deep sea 　 begins at ____. (3) The Titanic 　 rests at ____. (4) A whale can 　 dive to ____. Depth of the Mariana Trench D A C B A class is asking a deep-sea researcher some questions after his talk. Guess the topics they discuss. □ 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 deep-sea researcher A class is asking a deep-sea researcher some questions after his talk. Listen and tick ( ) the topics they discuss. □ 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 again. Complete the sentences with the facts from the conversation. (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 “see”. Some can even create their own ________. (4) There is rubbish even at ________ metres deep. deep sea / ocean floor Listening tip Find the key words. When you hear them, pay close attention — the answer is usually nearby. 2020 blind light 11,000 Why is it important to research the deep sea? Think further. • 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 everywhere. We should do something about it and protect our home. • … 12. Think of more questions you would like to ask the deep-sea researcher. • Talk about reasons: Why ...? • Talk about features (特征) : What are ... like? • Ask for more information and give an answer: Which ...? / What is the ...? Are there any other … about ...? What else ...? • Ask for opinions: What do you think of ...? What should we do? Language bank 13. 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? ... (Researcher) Checklist Talking about geography facts Content (内容) □ Ask questions about different aspects (方面) of the topic □ Share geography facts □ Summarize key points ☆☆☆ Language (语言) □ Use wh- questions to ask about geography facts □ Use superlatives to describe geography facts □ Use adjectives to express feelings and add details ☆☆☆ Performance (表现) □ Pronounce correctly, speak loudly and confidently ☆☆☆ 14. Evaluate with the following checklist. Homework 1. Research the answers for the questions in 2d. • What is the largest shark in the deep sea? • What is the bottom of the deep sea like? 2. Organize and practise your conversation with your partner. Lavf59.14.100 null 18528.0 null 110422.555 null 97647.43 Lavf59.27.100 Packed by Bilibili XCoder v2.0.2 Blues 70372.93 $