Unit 2 Topic 2 Section C课件2025-2026学年仁爱科普版（2012）英语九年级上册

Unit 2 Loving Our Planet Topic 2 All these problems are very serious Section C Unit 2 Loving Our Planet Topic 2 All these problems are very serious Section C Administrator (A) - Watch video and discuss what you have learnt from it. 1. Is ozone layer important or unimportant? It’s very important. 2. Can the ozone layer protect us? Yes. 3. What happened to it now? There is a big hole in the ozone layer. 4. What’s the effect of it? It’s harmful to all the living things, especially to humans for it does harm to our eyes and skin. Lead in Ozone is a special kind of oxygen. It can protect the earth. New words ozone layer [ˈoʊzoʊn ler] [ˈɑːksɪdʒən] People produce lots of harmful chemicals into the air. They cause a big hole in the ozone layer. So the radiation can pass through the hole and reach the earth directly. [ˌreɪdiˈeɪʃn] 穿过 [dəˈrektli] New words carbon dioxide /ˈkɑ:bən daɪˈɔksaɪd/ oxygen / 'ɒk sɪ dʒən/ CO2二氧化碳 O2氧气 New words Trees can breathe in__________________ and breathe out_________________. carbon dioxide(CO2) oxygen(O2) 吸入 呼出 形成 /ˈblæŋkɪt/ 毯子 /ɪˈskeɪp/ 逃离、渗出 It has formed a blanket and the heat from the sun can’t escape. The temperature is rising. rise /ˈraɪz/ 上升 But Carbon dioxide has increased a lot. New words (增加) (热气） fewer trees factory pollution traffic pollution the ozone hole more carbon dioxide Look at the following pictures and predict the main idea of the passage. 预测 Presentation Watch the video and then act the dialog out, paying attention to the pronunciation and intonation. Skimming 1.Choose suitable titles for Paragraphs 2-6. Then write it down in front of each paragraph. A.Traffic pollution B. Factory pollution C. Fewer trees D.The ozone hole E. More carbon dioxide _________ All over the world, people have cut down millions of trees. When it rains or when the wind blows, the earth is taken away. Forests have become deserts, so many kinds of animals and plants are disappearing. C. Fewer Trees Paragraph 2 take away 拿走、带走 Skimming _________ In big cities, cars and buses have polluted the air. Now many people in cities have health problems. Paragraph3 A. Traffic Pollution Skimming _______________ Factories have also polluted the land and the water. As a result, many rivers and lakes are now dead. Paragraph 4 B. Factory Pollution Skimming __________________ Around the earth, there’s a special kind of oxygen called “ozone”(O3). It is important to the earth. But now air pollution is destroying it and making a very big hole in the ozone layer. Too much harmful radiation from the sun passes through the hole and reaches the earth directly. This is very dangerous because this kind of radiation can cause cancer. Paragraph 5 D.The Ozone hole Skimming __________________ Carbon dioxide (CO2) in the air has increased a lot. It mainly comes from burning oil, coal and wood. This has formed a blanket around the earth. The heat from the sun can’t escape so the temperature is rising. This is called “the greenhouse effect”. It causes the level of the oceans to rise and the climate of the earth to change. Paragraph 6 E.More Carbon Dioxide Skimming Scanning 1b Read 1a and complete the following tasks(1b 2-5) . 2.What does our planet mean here? A. The sun. B. Mars. C. The moon. D. The earth. ❀ 原文：But during this period, we have changed our planet a lot in many ways. Some things we have done are good for our earth while others are bad. 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 1b Read 1a and complete the following tasks. 3.In the passage, blanket refers to ____. A. carbon dioxide around the earth B. the ozone layer in the sky C. the forests around the world D. pollution all over the world refer to 涉及、提到 ❀ Scanning 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 5. What is the best title for this passage ? Environment Problems B. Pollution on the Earth C. Hope for the Future D. The Greenhouse Effect 1b Read 1a and complete the following tasks. ❀ Scanning The earth is taken away. take away: Eg:难道你要拿走他们的铅笔吗？ Are you goingt to their pencils? 泥土被带走 take away 拿走、带走 Language points As a result, many rivers and lakes are dead. 结果，许多河流和湖泊都死了,没有活的生物。 1. As a result：因此，结果 Eg: 因此，他们会非常具有说服力。 , they can be very persuasive. As a result 2. be dead 死气沉沉 Language points 有害辐射穿过这个洞 The harmful radiation passes through the hole . pass through the hole 穿过洞 pass through 穿过 空气可以通过潮湿的布料。 Air will the wet cloth. pass through Language points It causes the level of the oceans to rise and the climate of the earth to change. 它导致了海平面的上升以及地球气温的变化 1. the level of the oceans 海平面 2.cause:造成”、“使(发生) Smoking may cause lung cancer. 吸烟可导致肺癌。 The bad news caused her to be sad. 这个坏消息使她伤心。 cause…to do… cause sth.: Language points 1. _________, many rivers and lakes ________. 2.The harmful radiation______________ the hole . 3.It _________the level of oceans ___________. 4. The earth ______________ (泥土被带走）. Practice: Fill in the blanks As a result are dead passes through causes to rise is taken away Language points Problem Effect on the environment fewer trees forests become deserts, animals and plants disappear traffic pollution greenhouse effect, level of oceans rising, climate change Retell it cars and buses pollute air, health problems pollute land and water, rivers and lakes dead harmful radiation reaches the earth, cause cancer factory pollution ozone hole more CO2 1C:Read again and complete the notes according to 1a. Let’s do We learn: 1. Some words: hole, form, rise 2. Some phrases: take away, refer to 3. Some sentences: All these problems are very serious, so we must do something now. We can: 1. Talk about the harm of pollution. 2. Combine the key points to form a short passage. Summary Read 1a after class； 2.Memorize the useful expressions and key words which we learn today. 3. Write a passage which we discuss in class Homework $