Unit 8 A green world Welcome to the unit课件 2025-2026学年译林版 英语八年级下册

该初中英语课件围绕“绿色世界”主题，聚焦污染类型（土壤、噪音、空气、水等）、成因及减少污染方法，通过视频导入地球主题，结合图片识别、表格分析污染成因，再以听力、阅读构建知识支架，引导学生从认知到应用。 其亮点在于融合语言能力与思维品质，通过听力填空、角色扮演提升语言运用，Further thinking环节拓展污染成因培养分析思维，结合家乡污染实例增强文化意识。任务型活动与重点词汇句式小结，助力学生环保意识与语言能力提升，也为教师提供清晰教学路径。

Welcome to the Unit Unit 8 A green world 1 Learning aims 能说出不同的污染及其成因 能谈论如何减少污染 2 Lead in What’s the video about? 3 Activity 1 Say different kinds of pollution and their causes Look and say soil pollution noise pollution air pollution water pollution Do you know what types of pollution are shown in the pictures? Do you know other types of pollution? forest pollution oil pollution soil pollution factory waste too many farm chemicals rubbish heavy metals noise pollution traffic noise factory machines building work noise loud music and parties What are the causes of these kinds of pollution? air pollution factory smoke car exhaust (废气) burning coal and oil forest fires water pollution dirty water from factories dirty water from homes farm chemicals oil leaks (泄露) Type Causes Soil pollution Chemical waste Other rubbish from humans (1) __________________ too many trees Noise pollution Noise from (2) __________________, trucks and buses on the road Noise from building work Air pollution Burning of unclean fuels (3) __________________ Water pollution Chemicals poured into rivers and lakes (4) __________________ The Class 1, Grade 8 students are learning about pollution. Listen to the introduction to four types of pollution and fill in the blanks. Cutting down cars Smoke from factories Wastewater Can you talk about other causes of the four types of pollution? Over-using chemical fertilizers and waste from farms ... Loud music in public and fireworks at festivals ... Burning leaves and stalks and smoke from barbecues ... Trash ending up in rivers and dirty water from washing dishes and cars ... Further thinking Activity 2 Talk about how to reduce pollution After learning about the causes of the four types of pollution, how can we reduce pollution? 10 Millie and Daniel are talking about reducing pollution. Listen to the conversation and complete the table below. Air pollution Water pollution 1. ___________to school with others. 2. Take_______. 3. ______________. 1. Use _______________ cleaning products. Share a ride the bus Plant more trees more eco-friendly Millie: What can we do to reduce air pollution? Daniel: It’s a good idea to share a ride to school with others or take the bus. Millie: Yes. We can also ride a bike if we live close. Daniel: Good idea. We can plant more trees. Millie: I agree. And what about water pollution? Some rivers don’t look clean and clear! Daniel: We should use more eco-friendly cleaning products. Millie: Yes. That will reduce water pollution. Reading Millie: What can we do to reduce air pollution? Daniel: It’s a good idea to share a ride to school with others or take the bus. Millie: Yes. We can also ride a bike if we live close. Daniel: Good idea. We can plant more trees. Millie: I agree. And what about water pollution? Some rivers don’t look clean and clear! Daniel: We should use more eco-friendly cleaning products. Millie: Yes. That will reduce water pollution. Role play Think & share How to live a green life? reduce air pollution by riding bicycles It’s wise for people to choose public transport. Means of transport save energy by turning off the lights when leaving wind energy solar energy save energy by using natural resources save water by taking shorter showers Reuse the water to flush the toilet. protect the environment by recycling waste Which type of pollution is the biggest problem in your hometown? Explain. Version 1: In my hometown, air pollution is the biggest problem. Many factories give off black smoke. Also, there are too many cars on the roads. Their exhaust makes the air dirty. On foggy days, we can’t see far and my throat feels bad. Version 2: I think the biggest environmental problem in my hometown is soil pollution. It comes from many things, like thrown-away cigarette butts and too much chemical fertilizer on farms. What can we do to solve the biggest problem in our hometown to live a greener life? Let’s Fix Air Pollution in Our Hometown First, factories should clean their smoke. They can use machines to make the black smoke clean before letting it out. If some factories keep polluting and don’t change, the government should punish them according to law or even close them down. Second, we can ride bikes or take buses more. Students can ride bikes to school, and grown-ups can take buses to work. Fewer cars mean less exhaust. Maybe we can also drive electric cars—they don’t make exhaust at all! Let’s plant more trees! Trees are great air cleaners. Planting them in parks and neighborhoods will help take in dirty air. Small steps can make a big difference. Let’s work together to make the air in our hometown clean again! Language points 1. Chemicals poured into rivers and lakes 这里是过去分词短语作后置定语，用来修饰前面的名词chemicals。 名词chemicals和动词pour之间是被动关系 —— 化学物质是"被倾倒"的对象，因此用过去分词poured来体现被动。 chemical adj. 化学品的；化学的 c.n. 化学制品 e.g. We learn chemical knowledge in science class. 我们在科学课上学习化学知识。 Some chemicals in the river are bad for fish. 河里的一些化学制品对鱼有害。 拓展：n. chemistry 化学（学科）chemist 化学家；药剂师 pour vt. & vi. 倾倒，倒出；倾泻 pour ... into ... 把……倒入…… pour down（雨）倾盆而下 e.g. Please pour some water into the glass. 请往杯子里倒些水。 The rain poured down all night. 雨下了一整夜。 Summary ◆重点词汇 ◆重点句式 cause, soil, chemical, truck, unclean, fuel, pour, clear, eco-friendly, separate It’s a good idea to share a ride to school with others or take the bus. We can also ride a bike if we live close. We can plant more trees. We should use more eco-friendly cleaning products. That will reduce water pollution. Exercise 根据汉语提示填写单词 1.Too many 　　　　(化学制品) can hurt small animals.  2.　　　　 (卡车) on the road make too much noise every day.  3.People should stop 　　　　(污染) rivers with waste water.  4.We should use 　　　　___(环保的) bags instead of plastic bags.  5.Cutting down too many trees is one of the causes of 　　　　(土壤) pollution.  chemicals Trucks polluting eco-friendly soil Homework (1) Introduce the ways to reduce pollution in daily life. (2) Recite the conversation in B and make up a new one. 28 Blues 89444.18 Blues 52061.32 $