Unit 4 Section B（2a-2c）（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）

Section B 2a-2c Unit 4 The Wonders of Nature Learning Aims 语言能力 文化意识 思维品质 学习能力 掌握本课时自然奇观相关核心词汇，能在语境中辨析、运用词汇，完成读写练习。 掌握语境记忆、联想记忆等词汇学习方法，提升自主学习和合作探究能力，养成主动积累词汇的习惯。 通过词汇分类、语境运用，培养逻辑推理、归纳总结和灵活迁移能力。 了解中外著名自然奇观，尊重自然多样性，树立环保意识。 Sahara Desert撒哈拉大沙漠 large small Mount Qomolangma珠穆朗玛峰 high long The Nile 尼罗河 low short Taklimakan Desert塔克拉玛干沙漠 Mount Tai 泰山 The Yellow River 黄河 Match the words on the left with their opposites on the right. 1.____ below　 　 5. ____ top 2.____ common　 　6. ____ northern 3.____ low　　　 　7. ____ risky 4.____ dead　　　 8. ____ survive A. safe　　　 E. unusual B. bottom　　 F. living C. southern　 G. high D. above　 　 H. die D E G F B C A H 2a below common low dead top northern risky survive above unusual high living bottom southern safe die adj. adv. v. prep. n. common — unusual; low — high; dead — living; northern — southern; risky — safe low — high; below — above survive — die below — above top — bottom Read the examples and make more sentences using how and the words in the box. How far is it from your home to school? How heavy is a blue whale? How large is your country? How often do you exercise? long　high　deep　old　fast　soon How long is the Yangtze River? How high is the Mount Kilimanjaro? How deep is the Mariana Trench? How old is the Lake Baikal? How fast can you run? How soon can we get there? 1. 2. 3. 4. 5. 6. 2b 6 How far is it from your home to school? How heavy is a blue whale? How large is your country? How often do you exercise? 询问路程或距离 询问重量 询问面积或规模 询问频率 How + adj. + be + subject? 询问人或物的属性、感受或状况 How + adv. + do(助) + subject + v.? 询问动作的细节，包括进行方式、频率或时间 注意：通过观察我们可以发现How后接的单词均为形容词或副词，即“How +adj./ adv.”。 Do you know about Lake Baikal (贝加尔湖) 贝加尔湖(Lake Baikal)，位于俄罗斯东西伯利亚南部，在布里亚特共和国和伊尔库茨克州境内，湖总容积23.6万亿立方米(2015年)，最深处达1637米(2015年)，是世界第一深湖、亚欧大陆最大的淡水湖。湖长636千米，平均宽48千米，面积为3.15万平方千米，由地层断裂陷落而成，湖面海拔455米，平均水深730米。 Do you know about Lake Baikal 贝加尔湖 Complete the passage with the correct forms of the words in the box. deep　survive　wonderful　surface　dive Located in Siberia, Russia, Lake Baikal is one of the world's most famous lakes. It is the ______ freshwater lake in the world. To reach the bottom, you must ______ 1,620 metres! It is also larger than most other lakes. Its ______ covers 31,500 square kilometres. That is bigger than the country of Belgium! Lake Baikal is cold most of the year. But over 1,200 different types of animals can still ______ in this environment. Today, the lake still attracts many curious travellers. After all, it is a great natural _______! deepest dive surface survive wonder adj.位于 西伯利亚 贝加尔湖 adj.淡水的 saltwater 咸水的 比利时 n.种类 v.吸引 adj.好奇的 n.旅行者 adj.自然的 artificial 人造的 2c 1. How deep is Lake Baikal? 2. How large is it? It is 1,620 metres deep. Its surface covers 31,500 square kilometres. 3. What did the passage compare Lake Baikal with? Why? 4. Why do you think many travellers visit Lake Baikal? It compared Lake Baikal with the country of Belgium because it is larger than most other lakes. Because it is one of the world’s most famous lakes, the deepest freshwater lake on Earth, and a great natural wonder. Its huge size, unique environment, and rich wildlife attract curious travelers. Where: What: Surface: Climate: Animals: Siberia, Russia the deepest freshwater lake in the world (1,620 m) 31,500 square kilometres cold most of the year over 1,200 different types Lake Baikal Finish the mind map and try to introduce Lake Baikal. deepest surface located animals How deep? 1,620metres How large? 31,500 square kilometres How many? over 1,200 different types of animals Siberia, Russia Lake Baikal Located in ______, ______ is one of the world’s most famous ______. It is the ______ in the world. Its surface covers ______ square kilometres. That is bigger than the country of ______! ______ is ______ of the year. ______ can still survive here. Lake Baikal Evaluation(评价) Complete content (内容完整) Correct language (语言准确) Clear voice (自信表达) Where: What: Surface: Climate: Animals: Language points Point 1 Located in Siberia, Russia, Lake Baikal is one of the world’s most famous lakes. 贝加尔湖位于俄罗斯西伯利亚地区，是世界上最著名的湖泊之一。 动词：locate（v. 定位；找到；使坐落于） 名词：location（n. 位置；地点） 形容词：located，意为“位于，坐落在”。 常见搭配：be located in/at/on（位于……） 例句：The famous castle is located in Scotland. 这座著名的城堡位于苏格兰。 Our company's new office is located at the foot of the mountain. 我们公司的新办公室坐落在山脚下。 e.g. Chaka Salt Lake is a beautiful lake located in Chaka Town in Qinghai, China. 茶卡盐湖是一座美丽的湖泊，位于中国青海的茶卡镇。 Chongqing is located in southwestern part of China. 重庆位于中国的西南部。 1. The small village ________ (locate) at the foot of a big mountain is very beautiful. 2. Our new school library is ________ (locate) in the east of our campus. 3. The hotel ________ (locate) by the sea is a popular place for travelers in summer. located located located Point 2 Today, the lake still attracts many curious travellers. 如今，这座湖泊仍然吸引着许多好奇的游客。 attract作动词，意为“吸引，招引”，attract the attention of ... 吸引……的注意 attraction作名词，意为“吸引；有吸引力的事物”，tourist attraction 旅游景点 Mr Smith tried to attract all the students’ attention to his class. 史密斯老师在他的课堂上尝试吸引所有学生的注意力。 They hope that Hua Hua can help attract more visitors to Chengdu. 他们希望花花能帮助吸引更多游客来成都。 curious /ˈkjʊəriəs/ adj. 好奇的；求知欲强的 可作定语或表语。 be curious about 对……好奇 He is such a curious boy, always asking questions. 他这个孩子好奇心很强，总是爱提问。 As a child, I’m curious about the UFO. 作为一个小孩，我对不明飞行物感到好奇。 She is curious about everything and she loves to meet new people and listen to their stories. 她对一切都充满好奇，喜欢结识新朋友，听他们讲故事。 1.The little boy looked at the magic box _________ (curious), wondering what was inside. 2.Her __________ (curious) made her open the door and walk into the room. 3.孩子们总是对自然界的一切事物感到好奇。 Children are always _________ _________ everything in nature. curiousity curious about curiously 【拓展】curiously[副词]好奇地 “ Are you an artist? ” Sara asked curiously. “你是画家吗？ ”萨拉好奇地问道。 Children show curiosity about everything. 儿童对一切事物都显露出好奇心。 Learning can be exciting when you follow your curiosity! 当你追随自己的好奇心时，学习会变得令人兴奋！ 【拓展】curiosity n. 好奇心；求知欲 Point 3 After all, it is a great natural wonder.毕竟，它是一处伟大的自然奇观。 自然的；天然的 常见搭配：natural resources/beauty/environment 自然资源/美景/环境 We can enjoy the natural beauty in the mountains. 我们可以欣赏大山里的自然美景。 天生的；本能的 It’s natural for people to wonder and worry about opinions of others. 好奇和在意别人的想法是人的天性。 【拓展】nature n.大自然 naturally adv. 自然地 常用于句型It’s natural (for sb.) to do sth.中。 e.g. Without plants, the natural world would be very different! 如果没有植物，自然界将会大不相同！ Babies have a natural fear of falling. 婴儿本能地害怕跌倒。 It's not natural for a child of his age to be so quiet. 像他这个年纪的孩子如此安静不正常。 【语境应用】选择natural的汉语意思 A. 本能的 B. 自然的 C. 未经加工的 (1) There are lots of natural disasters (灾害) this year. _______ (2) This juice is 100% natural. _______ (3) It's natural to worry about your parents. _______ B C A 1._______ (nature) resources are important and we should use them wisely. 2. We should try to protect ______ (natural) and live in harmony with it. 3.She has practiced the piano for years, so she plays it _________ (natural) in front of the audience. Natural nature naturally Exercises 单项选择 一、单项选择 ( )1. After the heavy rain, we were surprised to find the little bird in the tree was still ______. A. live B. alive C. lovely D. lively ( )2. Zhujiajiao is an amazing ancient town and it ______ millions of tourists every year. A. attracts B. develops C. encourages D. takes ( )3. Lake Baikal, Located in Siberia, Russia, is one of the world's ___lakes. A. more famous B. most famous C. famous D. famousest ( )4. There are so many ______ of smart phones in this shop. I really don’t know which to buy. A. parts B. types C. sizes D. customers B A B B 二、根据所给提示完成单词。 1. Yesterday, Jack built a beautiful house on the beach with the ________(沙子). 2. Children are very ________(好奇的)about the world around them. 3.My weekly shopping list __________ (包括)milk, eggs and bread. sand curious includes 4. Every summer, many tourists come to the ________(海滨) for a vacation. 5. He tried his best to keep the tree a________, but it died in the end. coast alive 三. 用方框中所给词的适当形式填空 1. The scientists plan to ____________ on the mountain. 2. We should learn to ____________ different problems in our daily life. 3. You will ____________ finish the work if you keep trying. 4. The train will ____________ the station in five minutes. 5. He saved money ____________ to buy a new bike. arrive at be able to do research bit by bit deal with arrive at　be able to　do research　bit by bit　deal with 6. As one of the mountain ___________, Adam is used to taking risks. 7. The red sun slowly came up from the top of the hill in the ___________ . simple, distance, degree, climb, protect climbers distance 8. In any difficult situation, _________ stay calm and you will find out the way to solve problems. 9. Many heroes risk their lives ___________ people and make the world a better place. simple, distance, degree, climb, protect simply to protect 10. The weather forecast said the temperature would rise by five ___________ tomorrow. degrees 三、用括号内所给词的适当形式填空。 1. He tried his best to keep the tree ________ (alive), but it died in the end. 2. The guide told the ___________ (travel) not to walk alone in the forest after dark. alive travellers 3. A healthy lifestyle ___________ (include) a balanced diet, regular exercise and enough sleep. includes 4. The bird builds its “home” by using __________ (nature) materials like leaves and grass. natural 5. It’s ________ (risk) to go hiking in the mountains when the weather forecast says it will rain. 6.Many kinds of birds spend winter in the _________(south) part of China. 7.We saw many______(type) of colourful fish swimming happily in the clear stream yesterday. risky southern types 8.________(nature) resources are important for us. And we should use them wisely. 9.The little boy was _______(curiosity) about how the clock worked, so he took it apart carefully. 10.As ________(travel), we should remember: When in Rome, do as the Romans do. 11.It’s _____(risk) to cross the road without looking both ways first. Natural curious travellers risky 二、根据汉语提示完成句子。 1. 经过长时间的攀登，他们终于到达了山顶。 They finally ________ ______ _____ of the mountain after a long climb. 2. 汤姆对这台机器的工作原理很好奇。 Tom _____ ________ ________ how the machine works. 3. 坐落于湖南湘西土家族苗族自治州，凤凰古城是一座历史悠久的古镇。 _________ _____ Tujia-Miao Autonomous Prefecture of Xiangxi, Hunan, the Ancient Town of Fenghuang is a historic town with a long history. Located in reached the top is curious about 4. 这座山不是最高的，但海拔有1860米。 This mountain isn’t the highest, but it’s 1,860 metres _______ _____ ________. 5.位于新疆北部的城市阿勒泰吸引了人们的目光。 Altay, a city in northern Xinjiang, _______ _________ __________. 6. 正如她所说，自然奇观值得探索。 _____ _____ _____ _____, natural wonders are worth exploring. 7. 老师不允许我们在课堂上使用手机。 The teacher _______ _____ ____ _____ use mobile phones in class. above sea level attract people’s attention As she put it doesn’t allow us to 8. 他们花了很长时间才到达那座高楼的顶部。 It took them a long time to _____ _____ ____ of the tall building. 9. 他冒着生命危险去救那个溺水的孩子。 He _____ _____ _____ _____ save the drowning child. 10. 你觉得他们能在沙漠的恶劣环境中生存下来吗？ Do you think they can _______ ____ _______ _________ in the desert? reach the top risked his life to survive the terrible conditions 本课句型 Summary 我都 学会了! Key words Expression Sentences Basic (必做) 用how句型写 3-5 句话提问贝加尔湖，并回答描述。 Improving(选做) 2.使用至少5个本课词汇，写一段介绍贝加尔湖或者你最喜欢的自然景观的短文。 Extend (选做) 3.上网查询更多关于世界自然景观的资料，阅读后以自己喜欢的方式（如海报、简报、口头报告）在班级分享。 Homework Thank you ! Lavf59.14.100 $