Unit 5 A fine balance Developing ideas Listening and speaking 课件 2026-2027学年外研版英语九年级上册

Unit 5 A fine balance Listening and speaking Objectives In this class, we will learn about the importance of rainforests and the threats they face. form and explain your own opinions about protecting ecosystems. learn to describe environmental problems and explain solutions step by step. Lead in Watch a video and answer He is cutting down trees. It may happen in a forest. What is the man doing? Where may this happen? Pre-listening Why do people cut down trees? They may do this: for sale for building houses How does this influence nature? Pre-listening Some animals may lose their homes and it does great harm to the environment. Logging means cutting down trees (often for sale). Some logging is against the law and does great harm to the environment. But logging is often hard to notice in rainforests. Logging cutting down 砍伐；砍倒 against the law 违法的 does great harm to 对...造成巨大伤害 hard to notice 难以注意到的 伐木 How do you feel about logging? Logging has two sides: on the one hand, it gives us wood, paper and jobs. On the other hand, too much logging harms forests, animals and the environment. So I think we should cut trees in a smart way and plant new ones. A class is having a geography lesson. The teacher is going to talk about rainforests. While-listening Listen to the beginning of a lesson and choose the things mentioned. (多选) a Where you can find rainforests. b Why rainforests are important. c What animals live in rainforests. d Why rainforests are disappearing. Listen and choose. What type of text is it? It’s a ______ about rainforests. quiz 知识竞赛 What is the quiz used for? A. To test how much we know about something. B. To make the class more interesting. C. To decide who is the best student. While-listening While-listening Listen again and tick True or False. Let’s see how much you remembered from the first listening. lungs of the earth Rainforests are disappearing to make paper While-listening Today we’re going to talk about the rainforest, a part of nature that is important to us all. Rainforests are often called the “lungs of the earth”. That’s because they produce oxygen and help control the world’s climate. Rainforests cover only about 6% of land. However, they are home to more than half of the animals and plants on the earth. Rainforests are disappearing because of human activity. Farmers cut down trees to make more space for their animals. Also, factories cut down trees to make paper. In 2021 alone, about 37,500 square kilometres of rainforest were lost. That’s about ten football fields every minute! It’s a serious problem. Tapescript lungs of the earth Rainforests are disappearing to make paper What’s the serious problem? The area of rainforests has been reduced severely because of human activities . How to solve this problem? A radio programme is introducing a useful way to protect rainforests. While-listening Listen to the radio programme and choose the correct answer. 1.What does Topher White do to solve the problem? A. He puts “ ears” on trees by using old mobile phones. B. He trains forest guarts to recognize the noise of cutting tress. He plants more trees to replace those lost to logging. 2. Which of the following is NOT part of Topher White’s invention? A. A solar panel B. A microphone C. A camera 3. What area of rainforests has been saved by the invention? A. About 350,000 square kilometers. B. Over 2,500 square kilometers. C. Only 10 square kilometers. While-listening Listen to the radio programme again and complete the notes. 1.against 2.difficult 4.mobile phone 3.ears 5.tied 6.catches the noise 7.the place 8.10/ten While-listening Check your answers. Welcome to today’s programme. We will tell you a useful way to deal with your old mobile phone. Logging in rainforests is usually against the law. However, it’s difficult to notice it. Topher White, a US engineer, has come up with a solution – he puts “ears” on trees. His invention uses an old mobile phone, a solar panel and a microphone. This is how it works: First, the invention is tied to trees. Next, an app on the mobile phone starts listening. When it catches the noise of cutting down trees, it sends an alarm to the forest guards. The guards can soon find the place and stop the logging. The invention has been used in 10 countries. It has saved over 2,500 square kilometres of rainforests. That’s about the size of 350,000 football fields. against difficult mobile phone ears tied catches the noise the 10 place While-listening Listen again. Then talk about how the presenter explains the working of the invention. His invention uses an old mobile phone, a solar panel and a microphone. This is how it works: First, the invention is tied to trees. Next, an app on the mobile phone starts listening. When it catches the noise of cutting down trees, it sends an alarm to the forest guards. The guards can soon find the place and stop the logging. How does Topher’s invention work? Explaining how something works You can start with This is how it works or It works like this. To give a clear explanation, use steps. You can use words that describe an order, such as first, next… Learning to learn Start with This is how it works or It works like this. Use words that describe an order, such as first, next… Post-listening Read and answer Welcome to today’s programme. We will tell you a useful way to deal with your old mobile phone. Logging in rainforests is usually against the law. However, it’s difficult to notice it. Topher White, a US engineer, has come up with a solution – he puts “ears” on trees. His invention uses an old mobile phone, a solar panel and a microphone. This is how it works: First, the invention is tied to trees. Next, an app on the mobile phone starts listening. When it catches the noise of cutting down trees, it sends an alarm to the forest guards. The guards can soon find the place and stop the logging. The invention has been used in 10 countries. It has saved over 2,500 square kilometres of rainforests. That’s about the size of 350,000 football fields. What problem do the rainforests face? What did Topher do to help? How does Topher’s invention work? What do you think of his invention? Illegal logging. He invented a tool that uses an old mobile phone, a solar panel and a microphone to stop illegal logging. This is how it works: First, the invention is tied to trees. Next, an app on the mobile phone starts listening. When it catches the noise of cutting down trees, it sends an alarm to the forest guards. It’s a clever idea and it has helped save a lot of rainforests Post-listening Work in pairs. Talk about Topher White and his invention. Think about: • What problem do the rainforests face? • What did Topher do to help? • How does Topher’s invention work? • What do you think of his invention? Useful expressions • … invented a tool that uses… • This is how it works: First, … • … has helped save… Next, … Then, … Finally, … • That’s really… • That sounds like a good idea. … is a big problem. What did Topher do to help? He invented… How does it work? It works like this: first, ... Post-listening Sample Logging in rainforests is a big problem. What did Topher do to help? He invented a tool that uses an old mobile phone, a solar panel and a microphone to stop illegal logging. How does it work? It works like this: First, the invention is tied to trees. Next, an app on the mobile phone starts listening. When it catches the noise of cutting down trees, it sends an alarm to the forest guards. The guards can soon find the place and stop the logging. What do you think of this invention? That’s really clever! It’s a simple idea, but it has helped save a lot of rainforests. Homework Must do: 根据课堂笔记，用英语写一段50词左右的短文，介绍Topher White的发明（要求使用first, next, then, finally 等连接词）。 Choose to do: 发挥想象力，设计一个"保护自然"的小发明，画出示意图并用英语写出发明说明（包括：名称、材料、工作原理、用途），下节课与同学分享。 Unit 5 Thank you! Listening and speaking null 67525.305 null 72619.68 $