Unit 5 Developing ideasⅠP73-75 课件 2025-2026学年外研版八年级英语下册

Unit 5 Developing ideasⅠ P73-75 Looking into nature 1 Learning Objectives In this class, you will talk about possibilities correctly. understand nature secrets, and finish the tasks. get specific information from the listening material and listen for opinions. 2 Listening and speaking 3 Lead-in Read and answer. Nature is full of secrets. They are waiting to be explained. These include black holes, the beginning of the universe, the Loch Ness Monster and Bigfoot. These secrets awaken our curiosity and drive scientists to better understand the wonders around us. How many secrets are mentioned(提到) in the passage? What are they? Four. They are black holes, the beginning of the universe, the Loch Ness Monster and Bigfoot. 4 Lead-in Match. the black hole 黑洞 the Bigfoot 大脚野人 the Loch Ness Monster 尼斯湖水怪 the beginning of the universe 宇宙起源 Which of the secrets interests you most? ... interests me most. Because it is... (unknown / alive / ...) 5 a A disappearing river in South America. b The life of the people in the Amazon rainforest. c A boiling river in the Amazon rainforest. Activity 1 Listen to the talk and choose the correct topic. Guide: Welcome to the Amazon rainforest! Now, I'd like to present a special river to you. Since ancient times, people have talked about a boiling river in the rainforest. Many people laugh at this story, but in fact, it’s true! The water can be as hot as 86℃. People here cook with it, clean with it and make tea with it! There’s no need to make a fire! The water only cools down after heavy rain. Then people go swimming in it. I think it’s one of the most amazing wonders of the rainforest. √ Activity 2 Read and think. What information should you listen for? facts about the river people’s activities the speaker’s opinion Activity 2 Listen again and complete the profile(简介). Guide: Welcome to the Amazon rainforest! Now, I'd like to present a special river to you. Since ancient times, people have talked about a boiling river in the rainforest. Many people laugh at this story, but in fact, it’s true! The water can be as hot as 86℃. People here cook with it, clean with it and make tea with it! There’s no need to make a fire! The water only cools down after heavy rain.Then people go swimming in it. I think it’s one of the most amazing wonders of the rainforest. Activity 2 Listen again and complete the profile(简介). 86 cook tea heavy rain amazing wonders Activity 3 Read and learn. Guide: Welcome to the Amazon rainforest! Now, I'd like to present a special river to you. Since ancient times, people have talked about a boiling river in the rainforest. Many people laugh at this story, but in fact, it’s true! The water can be as hot as 86℃. People here cook with it, clean with it and make tea with it! There’s no need to make a fire! The water only cools down after heavy rain.Then people go swimming in it. I think it’s one of the most amazing wonders of the rainforest. What’s the speaker’s opinion? Activity 4 Read and say. What is the conversation mainly about? How the boiling river came into being. Activity 5 Listen to the conversation and complete the table. Activity 5 Listen and check. Guide: Ancient people here thought that the sun makes the river hot. Boy: It's possible, right? There's a lot of sunshine here. Guide: Actually, it's unlikely for the sun to heat the river that much. Just think of outdoor swimming pools. Would the water get to 86°C in summer? sunshine heat the river Activity 5 Listen and check. Girl: You're right. But how about volcanoes? Perhaps the river passes a volcano and becomes hot? Guide: Good guess! But I'm afraid that's not the reason. The nearest volcano is about 700 kilometres away. becomes hot 700 kilometres / 700 km Activity 5 Listen and check. Girl: I have another idea! Maybe there are some chemicals in the water. They can produce heat. I've studied them at school. Guide: That's possible. But scientists haven't found such chemicals in the river yet. They need to do more research... in the water produce possible research Activity 6 Listen again. Then talk about how the speakers discuss possibilities. Guide: Ancient people here thought that the sun makes the river hot. Boy: It's possible, right? There's a lot of sunshine here. Guide: Actually, it's unlikely for the sun to heat the river that much. Just think of outdoor swimming pools. Would the water get to 86°C in summer? Girl: You're right. But how about volcanoes? Perhaps the river passes a volcano and becomes hot? Guide: Good guess! But I'm afraid that's not the reason. The nearest volcano is about 700 kilometres away. Girl: I have another idea! Maybe there are some chemicals in the water. They can produce heat. I've studied them at school. Guide: That's possible. But scientists haven't found such chemicals in the river yet. They need to do more research... Activity 7 Listen and repeat. record a world record / record the temperature produce fresh produce / produce oxygen perfect a perfect gift / perfect her skills desert the biggest desert on earth / desert his duty /ˈrekɔːd/ /rɪˈkɔːd/ ​​/ˈprɒdjuːs/ /prəˈdjuːs/ ​​/ˈpɜːfɪkt/ /pəˈfekt/ ​​/ˈdezət/ /dɪˈzɜːt/ Activity 8 Look and say. What unsolved secrets of nature do these pictures show? Crop circles 麦田怪圈 Atlantis 亚特兰蒂斯 Activity 9 Work in pairs. Choose one unsolved secret of nature and talk about possible explanations. Have you heard of...? Yes, it's very strange. I'm curious about the possible reasons. Perhaps it's because... A B A The truth may be... It's likely that... Perhaps it's because... It's probably a result of... There's a (strong) possibility that... It's possible that... There's a chance that... Useful expressions： Activity 9 Example A: Have you heard of Atlantis? B: Yes, it’s very mysterious. I’m curious about the possible reasons. A: Perhaps there was an island. Something made the island sink into the sea. B: That’s possible. An earthquake might have caused it. A: Yes, maybe. It’s also possible that the city disappeared because of rising sea levels. B: Or maybe Atlantis never existed and it’s just a story. A: Yes, that could be true! Listening text Guide: Welcome to the Amazon rainforest! Now, I'd like to present a special river to you. Since ancient times, people have talked about a boiling river in the rainforest. Many people laugh at this story, but in fact, it’s true! The water can be as hot as 86℃. People here cook with it, clean with it and make tea with it! There’s no need to make a fire! The water only cools down after heavy rain. Then people go swimming in it. I think it’s one of the most amazing wonders of the rainforest. Listening text Guide: Ancient people here thought that the sun makes the river hot. Boy: It's possible, right? There's a lot of sunshine here. Guide: Actually, it's unlikely for the sun to heat the river that much. Just think of outdoor swimming pools. Would the water get to 86°C in summer? Girl: You're right. But how about volcanoes? Perhaps the river passes a volcano and becomes hot? Guide: Good guess! But I'm afraid that's not the reason. The nearest volcano is about 700 kilometres away. Girl: I have another idea! Maybe there are some chemicals in the water. They can produce heat. I've studied them at school. Guide: That's possible. But scientists haven't found such chemicals in the river yet. They need to do more research... Homework 1 2 记忆单词和短语并跟读听力文本。 根据本节课所学内容，整理问题What have you learnt about the secrets of nature in this section?的答案。。 Thank you! 24 null 48299.883 null 63946.418 null 40463.555 $