Unit 3 The environment Reading period1（课件）-2025-2026学年沪教牛津版英语九年级下册

该初中英语课件围绕“环境问题”主题，聚焦温室效应、森林砍伐及不良习惯等核心内容，通过视频导入（图瓦卢被淹没）引发兴趣，结合温室效应匹配题搭建知识支架，衔接对问题原因、影响的细节阅读与分析，帮助学生系统理解环境问题及解决措施。 其亮点在于任务链设计（匹配题、图表填空、选择题）提升语言能力，小组讨论生活不良习惯培养思维品质，渗透低碳生活建议强化环保责任（文化意识）。学生能将语言学习与实际结合，教师可高效开展读写活动，提升教学效果。

The environment Period1 9B Unit 3 Karida Learning objectives 1 To read and learn about the main problems we face in protecting the environment. 2 To learn the new words and useful expressions. 目录 壹 Lead-in 贰 Rre-reading 叁 While-reading 肆 Post-reading Lead-in Unit 3 Lead-in Watch a video then answer the following questions. Lead-in What is the name of the country shown in the video? Tuvalu. Why is this country at risk of being submerged（淹没）? Climate warming leads to the rise of sea levels. What are the main causes of climate warming? Pollution and the greenhouse effect. Pre-reading Unit 3 Let’s finish the exercise of A1 on page 34 to figure it out. Do you know what is “the greenhouse effect” ? What do you know about the greenhouse effect? Match the first half of the sentences in column A with the second half in column B. Write the correct letters in the blanks. e f b d c a A1 There is an atmosphere around the Earth, it controls the Earth’s temperature. However, we are polluting the Earth with harmful gases, the gases cause the atmosphere to keep in too much heat from the Sun.The Earth is getting warmer and warmer.We call this the greenhouse effect. Do you know what is “the greenhouse effect”? What’s the result of the greenhouse effect? What’s the result of the greenhouse effect? The greenhouse effect results in: polar ice melts and the rise of sea levels hurricanes (飓风) and other storms are likely to happen more frequently as well as floods and droughts (旱灾) fresh water will be less available some diseases spread faster. Let’s learn an article to learn more about the environmental problems. Pre- reading The article is probably from a(n) ______. A. advertisement （广告） B. poster about the Earth Hour C. environmental science book D. comic（连环画）book A. A narration (记叙文) B. A description（描述文） C. An argumentation（议论文） D. An exposition（说明文） Pre- reading What is the genre (体裁) of this article? 13 While-reading Unit 3 The world is _________ Main problem 1: __________ Main problem 3: ____________ Main problem 2: __________ Solution: We need to ________________ The greenhouse effect Cutting down forests Bad habits in danger take proper action Structure of the article. Read the part one then finish the following tasks. 1. What is the atmosphere around the world like? 2. What may the greenhouse effect cause? 16 What is the atmosphere around the world like? Reading for details The atmosphere around the Earth is necessary for all living things. It is like the glass of a greenhouse, letting sunlight in and keeping heat from getting out. Without it, the Earth would be the same as the Moon—cold and lifeless. =no life The greenhouse effect Task 1 When we burn fuels such as petrol and coal, we produce a gas called carbon dioxide(CO2). Too much of this gas pollutes the atmosphere, and causes it to keep in too much heat. As a result of the greenhouse effect, the Earth’s temperature is increasing. This causes sea level to rise, and in the future may cause cities to disappear. Complete the following chart Causes原因 The greenhouse effect A. 气体 B. 垃圾 C. 木头 D.燃料 burn fuels produce CO2 temperature: increase sea level: rise cities: disappear Effects结果 What’s petrol and coal? Task 2 18 1. Because of pollution, ______. a. not enough sunlight is reaching the Earth b. not enough heat is leaving the Earth c. not enough CO₂ is leaving the Earth Read the article again and circle the correct answers. b When we burn fuels such as petrol and coal, we produce a gas called carbon dioxide(CO2). Too much of this gas pollutes the atmosphere, and causes it to keep in too much heat. As a result of the greenhouse effect, the Earth’s temperature is increasing. This causes sea level to rise, and in the future may cause cities to disappear. Read the second part and complete the diagram. 20 Task 3 Effect 1 Effect 2 Effect 3 Effect 4 We destroy nature by _______ __________________________ ___________________ becomes worse. ____________________ __________ ____________________ _________ _________ _________ _________ __________ ______ take place and __ __________ _______ the environment. Cause down huge areas of forests cutting The green- house effect The homes of the animals that live in our forests are destroyed. The surface of the soil is easily destroyed by rain. Floods even more damage is done to 2. If there are more trees, the amount of CO₂ in the atmosphere will be ______. a. greater b. less c. the same Read the article again and circle the correct answers. b Cutting down forests Every year, we destroy nature by cutting down huge areas of forests. This makes the greenhouse effect worse because trees take in CO2 and produce oxygen. Cutting down trees also destroys the homes of the animals that live in our forests, and causes the surface of the soil to be easily destroyed by rain. This can result in floods and even more damage to the environment. Read the third part and complete the diagram. Bad habits Create mountains of rubbish Throw them away Use things once Many of our habits cause pollution. People often use things once and then throw them away, or leave them on the ground as litter. This creates mountains of rubbish and pollutes our land and seas. Pollute our land and seas Task 4 Read the article again and circle the correct answers. a 3. We can help protect the environment if we ______. a. change our bad habits b. become consumers c. buy more products Bad habits Many of our habits cause pollution. People often use things once and then throw them away, or leave them on the ground as litter. This creates mountains of rubbish and pollutes our land and seas. Read the last part and complete the table. Topic sentence ____________________________________________________________________ The writer’s suggestions to become _______________________ to ______________________________ ______________________________ to ______________________________ Conclusion We can __________________________. In order to protect the environment, we need to take proper action. “green consumers” buy and use products friendly to the environment recycle as many things as we can make a difference Task 5 4. The purpose of the article is to make_________. A. people do more to protect the environment B. more people become consumers C. people learn more about the atmosphere D. people change their bad habits 考查作者意图 Tip:理解主旨大意，切忌以偏概全。 Read the article again and circle the correct answers. Post-reading Unit 3 Discussion Activity Discuss the questions below in groups and then report your result to the whole class. Let’s see which group is the best! What other bad habits do people have in their daily lives? What should we do to help protect the environment? Waste food and water. Spit everywhere. Always drive cars to other places. Forget to turn off lights when we leave the room. bad habits … Let’s live a low-carbon life! Travel by public transportation. Turn off lights or electric appliances when not using. Take a shorter shower instead of a bath. Reduce, reuse and recycle. Get rid of bad habits. … THANK YOU Karida $