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

Section A 1a—1d Unit 4 The Wonders of Nature 通过听、说、看等方式，获取并正确认读关于自然奇观的地理类词汇（如waterfall, desert, trench等），感知描述自然景观特征的词汇用法（如level, surface, depth等）（学习理解） 01 通过听力捕捉、对话练习，获取文本中自然奇观的维度、规模等关键信息，归纳并内化用大数描述事物特征、问答自然奇观相关信息的常用表达（如...is the highest in the world, It’s...metres high/deep）（应用实践） 02 通过讨论和合作交流，理解自然奇观的独特价值，能够主动分享自己熟知的自然奇观信息，并认同探索和保护自然的重要性。 （迁移创新） 03 学习目标 Let’s enjoy some natural wonders of the world. Lead in 今天我们将进行“环球探险队”的队员选拔与首航任务，大家作为候选人，将通过完成听力、口语任务获得“探险徽章”，最终成为Global explorers,赢得“首航资格”。 Lead-in What do you know about MountQomolangma? What makes it amazing? It’s the highest mountain in the world. ... It’s 8848.86 metres high. What do you know about the Sahara Desert? What makes it amazing? It’s about 9,000,000 square kilometres in size. It’s the biggest desert in the world. ... What do you know about the Dead Sea? What makes it amazing? Its surface is 416 metres below sea level. It’s the lowest place in the world. ... What do you know about the Mariana Trench? What makes it amazing? It’s about 11,000 metres deep. It’s the deepest point in the ocean. ... 1a Match the places with the pictures. ____Nile River ____Angel Falls ____Mount Qomolangma ____Dead sea ____Sahara Desert ____Mariana Trench A B D E C F F A D C E B How much do you know about these amazing places? 1b 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 1c Try to read the following numbers. 英语数字的读法 416 8,848.86 11,000 9,000,000 英语中，数字从后往前数，每三位标一个逗号。 例： 9,000,000 百位和十位中间加and 小数点读作point, 小数点后的数字逐个单独读出。 thousand million 较大数字的表达方法 1000以上的基数词的表示法：从数字的右端向左端数，每三位数加一个逗点；从右端向左端开始，第一个逗点处读thousand(千)，第二个逗点处读million(百万)，第三个逗点读billion(十亿)；读的时候通常在hundred后加and,如果百位数为0，则在thousand后加and。 较大数字的表达方法 9,883 65,359 265,468 60,263,050 nine thousand, eight hundred and eighty-three sixty-five thousand, three hundred and fifty-nine two hundred and sixty-five thousand, four hundred and sixty-eight sixty million, two hundred and sixty-three thousand and fifty 1c 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 1d Talk about the places you have learnt about. What’s the lowest place on earth? It’s the deep sea. Its surface is 416 metres below sea level. Now, what’s … How low is it? A: What’s the lowest place on earth? B: It’s the Dead Sea. A: How low is it? B: Its surface is 416 metres below sea level. A: Now, 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. e.g. e.g. A: What is the largest shark in the deep sea? B: I think it’s the whale shark. A: Do you know how large it is? B: It can grow up to about 10 to 20 metres in length. A: What is the bottom of the deep sea like? B: It is dark, freezing, and has high pressure. There are also many unique creatures. A: Why is it important to research the deep sea? B: Because the deep sea has unique species for research, holds important resources, and can help control our climate. Report your group’s discussion result to the class. Evaluation(评价) Complete content (内容完整) Correct language (语言准确) Clear voice (自信表达) Hello, everyone! I'd like to share our group’s result about amazing places we will go. We choose... because it’s the ... in the world. It’s ... meters high/deep. It’s very... We also would like to explore ... Because ... it’s the ... in the world. It’s ... meters high/deep. It must be ... We all love to explore the world. Thank you! Post-listening Sum up what you have learned. Natural wonders Mount Qomolangma the highest Sahara Desert the biggest Dead Sea the lowest Mariana Trench the deepest Summary 8,848.86 9,000,000 416 11,000 最高级 (superlatives) “highest” is the superlative of “high” “biggest” is the superlative of “big” “lowest” is the superlative of “low” “deepest” is the superlative of “deep” 形容词 / 副词最高级变化规则 high— highest low — lowest deep —deepest 一般情况下，在词尾加-est large — largest fine — finest 以不发音字母e结尾的词，在词尾加-st heavy — heaviest easy — easiest early — earliest 以“辅音字母 + y”结尾的双音节词，先把y改为 i ,再加-est 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 GOOD, BETTER, BEST Good, better, best, Never let it rest, Till good be better, And better best. Bad, worse, worst, Never fight against, Get better and better, And you’ll be the best. big bigger biggest This apple is the biggest of the three. 10 yuan 20 yuan 50 yuan This pen is the most expensive of the three. expensive more expensive 写出下列单词的最高级。 1. good _______ 2. comfortable ________________ 3. big _______ 4. happy ________ 5. cheap ________ 6. many _______ 7. difficult ______________ 8. little _____________ best most comfortable biggest happiest cheapest most most difficult least Exercises 写出下列数字的英文表达。 433,024 856,730,452 59,725 four hundred and thirty-three thousand and twenty-four eight hundred and fifty-six million, seven hundred and thirty, four hundred and fifty-two fifty-nine thousand, seven hundred and twenty-five Homework 基础作业 拓展作业 实践作业 绘制一幅“世界自然奇观探险地图”，标注英文名称和关键数据。 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。 上网查询更多关于自然奇观的介绍，每人制作一个自然奇观海报在班级展览。 辅助资源： BBC Earth-Planet Earth National Geographic- Amazing Planet Discovery Channel-Wonders of Nature null 106556.055 $