Unit 3 The environment：Period 2 Reading (II) 课件 2024-2025学年沪教牛津版英语九年级下册

九年级 下册 教学课件 Unit 3 Oxford English Module 2 Environmental problems Period 2 Reading (II) The environment 1 Check-up Say something about the three main problems people face and their effects. The greenhouse effect Cutting down forests Bad habits 2 While you read The world is in danger Our world is in danger. We must do something to protect the environment. But, what are the main problems we face? The greenhouse effect 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. 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 first part of the text and put the sentences below in the right order. ( ) Too much CO2 pollutes the atmosphere. ( ) The atmosphere does not let the heat out. ( ) The atmosphere lets the sunlight in. ( ) The atmosphere keeps in too much heat. ( ) The sunlight reaches the atmosphere of the Earth. ( ) The greenhouse effect takes place—the Earth’s temperature increases. ( ) People burn fuels such as petrol and coal and produce a lot of CO2. 2 5 4 1 6 3 7 Read the first part of the text and put the sentences below in the right order. 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 second part of the text and complete the diagram. Read the second part of the text and complete the diagram. We destroy nature by ______ _________________________. _____________________becomes worse. ____________________________________________________________. ____________________________________________________________. ________take place and_____ _____________________ to the environment. cutting down huge areas of forests The greenhouse 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 Cause Effect 1 Effect 2 Effect 3 Effect 4 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 third part of the text and complete the diagram. Read the third part of the text and complete the diagram. People often _____________ _______________________, or _____________________ _________________. ___________________________________. __________________________________. This creates mountains of rubbish This pollutes our land and seas use things once and then throw them away leave them on the ground as litter Cause Effect 1 Effect 2 In order to protect the environment, we need to take proper action. We should be different from many consumers and become “green consumers”. This means that we should only buy and use products friendly to the environment. We should also recycle as many things as we can. We can reuse things for the same purpose as before, or we can use them for new purposes. If we just learn to live in new and different ways, we can make a difference. Read the last part of the text and fill in the table. 10 Topic sentence ______________________________ ____________________________________________________ The writer’s suggestions to become _________________ to _________________________ ___________________________ to _____________________as we can (e.g. ____________________ ________________________, ___ _______________________, etc.) Conclusion We can __________________. In order to protect the environment, we need to take proper action. “green consumers” make a difference Read the last part of the text and fill in the table. buy and use products friendly to the environment recycle as many things reuse things for the same purpose as before use things for new purposes 3 Vocabulary C2 Complete the conversation below with the words from the box. Change their forms if necessary. is resulting in/results in increases in danger make a difference take action 4 D1 Replace the italicized words with information from the article on page 35. Comprehension our world/the Earth The atmosphere around the Earth fuels such as petrol and coal The increasing temperature Cutting down trees pollution D2 Read the article again and circle the correct answers. D3 The writer gives an example of a bad habit that causes pollution. Can you name some other bad habits that cause pollution?. Discuss and answer What other bad habits do people have in their daily lives? What should we do to help protect the environment? H Homework 1. 抄写单词和短语： lifeless，fuel，coal，destroy，nature，soil，flood，friendly，recycle，purpose；result in，make a difference。 2. 整理Comprehension D3的讨论内容，准备在下节课作口头汇报。 3. 完成《练习册》第34页Vocabulary和第42至43页Reading B，C的练习。 感谢观看 THANK YOU $$