Unit 4 《Global Warming》學(xué)案43（新人教版選修6）

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111 Unit 4 Global Warming Period 4 Using Language Teaching Goals: 1.To discuss and read about global warming. 2.To learn to write a poster. Teaching Procedures: Step 1. Warming up Turn to page 30. Listen to the tape and follow in a low voice. Pause where the reader pauses. Pay attention to the pronunciation and intonation. Step 2. Reading 1. Individual work When you read the text for the second time you are supposed to underline all the useful collocations .You have to copy them into your notebook. I hope you can fully understand the importance of expressions in English learning. 2. Group work Discuss in groups the collocations from the text. Do a project on…; do…about…h(huán)ave effect on…; start with…get suggestions; have to power to; make a difference; put up with…come from…reduce the carbon dioxide content; be started with…; use energy in…leave…on; turn…off; turn up the heat; ride a bike; make…from…; be made from recycled materials; save energy; plant trees in the garden; absorb carbon dioxide from…; talk with…about… Step 3. Writing You are going to make a poster to tell your schoolmates ways to reduce the amount of carbon dioxide in the air. For your reference: How To Reduce the Amount of Carbon Dioxide Going into the Air. ● Use public transportation, walk or bike to school or work. If you must drive, join a carpool and use a car that gets high mileage. ● Use energy-efficient appliances and weatherize your home. ●Use renewable energy sources, like solar heart or wind power ,which don’t emit carbon dioxide. ● Switch from coal and oil to natural gas in power plants and factories .Natural gas releases the least amount of carbon dioxide. Step 4. Listening and discussing Now turn to page 31. Li Ben is doing an interview with Professor Chen about the use of different sources. Read the statements and listen to the tape recording of the interview to decide which statement the professor does not agree with. 1. We’ll have to stop using fossil fuels. 2. About 90% of the world’s energy comes from fossil fuels. 3. We can replace fossil fuels with renewable sources of energy. 4. Nuclear power is a good source of energy. 5. In the future, we’ll need new technologies to replace fossil fuels. 6. It’s the developed countries who are to blame for producing most of the carbon dioxide. Step 5. Closing down Discuss what we individuals can do about global warming in groups of four. Non-renewable不可再生能源 Renewable可再生能源 Coal煤炭能源 Gas石油能源 Nuclear核能源 Solar太陽(yáng)能 Wind風(fēng)能 Hydro-electric水電能源 Geothermal地?zé)崮茉? Step 6. Homework Make a poster for your school that tells Ss various ways they can reduce the amount of carbon dioxide in the air. 111