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

A fine balance Developing ideas Unit 5 Learning objectives learn about the importance of rainforests and the threats the face. learn to describe environmental problems and explain solutions step by step. forn and explain their own opinions about protecting ecosystems. By the end of the lesson, students will be able to: What’ s the main idea of the video? What’ s the main idea of the video? The video tells us that forests are important but are being cut down too fast, and we should care about deforestation (森林砍伐). 02 Pre-listening 1. What is the man doing? 2. Where may this happen? Look at the picture and answer the questions. Pre-listening He is cutting down trees. It may happen in a forest. 3. Why does he do this? 4. How does this influence nature? Look at the picture and answer the questions. Pre-listening He may do this for sale or building houses. Many animals will lose their homes. It does great harm to the environment. DID YOU KNOW? 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. be against the law 违反法律 do harm to 对...有害 Today we will learn how a great invention helps people stop illegal logging and protect rainforests. A class is having a geography lesson. The teacher is going to talk about rainforests. 1 Listen to the beginning of a lesson and choose the things mentioned. a Where you can find rainforests. b Why rainforests are important. c What animals live in rainforests. d Why rainforests are disappearing. 2 Listen again and tick True or False. 1. What type of text is it? 2. What is a quiz used for? It’s a quiz (小测验) about rainforests. To test how much we know about something. _________________ 2 Listen again and tick True or False. lungs ___ 地球之肺 disappearing paper ___ ___ . 1. Why are rainforests called the “lungs of the earth”? 2. How much land do rainforests cover on the earth? A. They have many kinds of animals. B. They produce oxygen and help control the world’s climate. C. They cover most of the land on Earth. D. They never disappear. A. 6% of land. B. More than half of land. C. 37,500 square kilometres. D. Ten percent of land. 3. What does “That’s about ten football fields every minute!” show? A. People build football fields in rainforests. B. Rainforests are disappearing at a terrible speed. C. There are many football fields in the forest. D. We can play football in rainforests. Listening script 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 rainforests were lost. That's about ten football fields every minute! It's a serious problem, Learning to learn Listening for reasons When people explain something or give an opinion, they will often provide reasons. Reasons are often introduced with words like as, because and since. A radio programme is introducing a useful way to protect rainforests. 3 Listen to the radio programme and complete the notes. prep/v-ing adj. n. n. prep./v-ed v n. adj./num. 3 Listen to the radio programme and complete the notes. against difficult ears mobile phone tied catches the noise the place 10/ten Listening script 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, came 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. Learning to learn 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... 4 Work in pairs. Talk about Topher White and his invention. Logging in forests is a big problem. He invented a tool that uses ... It’s... It works like this: First…Next... 4 Work in pairs. Talk about Topher White and his invention. Useful expressions •…invented a tool that uses.. •…has helped save... • That's really... • This is how it works: First, ... Next, ... Then, ... Finally, ... • That sounds like a good idea. ... is a big problem. What did Topher do to help? How does it work? It works like this: First… He invented… What do you think of the invention? A: Logging in rainforests is a big problem. What did Topher do to help? B: He invented a tool that uses an old mobile phone, a solar panel and a microphone to stop illegal logging. A: How does it work? B: 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. A: What do you think of this invention? B: That's really clever! It's a simple idea, but it has helped save a lot of rainforests. Example Next Slide Human progress and nature's survival are not enemies. They are two sides of the same balance — and we must find a way to keep both. 人类进步与自然生存并非敌人，它们是同一架天平的两端 —— 我们必须找到让两者共存的方式。 Thank You null 67525.305 null 72619.68 $