人教版九年级Unit 13 We're trying to save the earth!-Section A 1a—1c-ppt课件-(含教案)-公开课-(编号：37fcc).zip

The earth is polluted. Are they having a costume party? Have you ever seen such black smoke? air pollution The factories that burn coal pollute the air with a lot of black smoke. n. 煤炭煤炭 I wonder where to go The river used to be so clean, but now it is only in memory. Factories put waste into the river. water pollution I am not sure if I can call it “river “ again ! 1 Do you often speak loudly in public? Can you sleep well with so much noise? noise pollution There are more cars on the road. 1a Here are some words related to different kinds of pollution. Write them in the box below. Then add more words. noise pollution _ _ _ _ air pollution _ _ _ _ water pollution _ _ _ _ loud music planes ,cars mobile phones factories cars ,ships smoking ships factories littering rubbish building houses loud music cars rubbish planes littering ships factories smoking building houses mobile phones 1bListen and complete the sentences. What was the problem? The river was _. Even the bottom (底部底部) of the river was full of _. There were no more _ for fishermen (渔民渔民) to catch. really dirty rubbishfish What caused the problem? People are throwing _ into the river. Factories are putting _ into the river. How should the problem be solved? We should write to the _ and ask them to _ the factories. Everyone should help to _ the river. litter waste government close down clean up Make conversations using the pollution in 1a. The river was really dirty. Even the bottom of the river was full of rubbish. But it used to be so clean! 2a Listen to the interview. Circle the kinds of pollution that Jason and Susan talk about. A. land pollution B. air pollution C. noise pollution D. water pollution 2b Listen again and complete the sentences. 1. The air is badly polluted because there are _ on the road these days. 2. Factories that burn coal also _ the air with a lot of black smoke. more cars pollute 3. There is also too much rubbish and waste. People _ things every day. 4. People are also littering in _ like parks. This is turning beautiful places into ugly (丑陋丑陋) ones. are throwing away public places Lets have a talk show! 2c Interviewer: Today were talking to Jason and Susan about environmental problems. Jason and Susan, can you tell us about some of the problems youve seen? Jason: I think one problem is that the air is badly polluted. I hardly ever see blue skies anymore. Susan: Yes, and Interviewer: Jason and Susan, what are your ideas for solving these problems? (air pollution, waste pollution) Tips(提示）提示）: the conversation in 2d can help you! Think: As teenagers ,what should we do to save the earth? Turn off the lights /computers when you leave a room. stop riding in cars stop using paper towels or napkins（ 餐巾，餐巾纸）餐巾，餐巾纸） recycle books and paper 1.The earth is badly polluted. Please make a poster(海报）海报）to let people know that. 2.Make some shopping bags and napkins for your family and friends. .Unit 13 Were trying to save the earth! Section A (1a-2d) Teaching aims and demands: Words: litter bottom fisherman coal ugly advantage cost wooden plastic takeaway bin Phrases: noise pollution air pollution water pollution Sentences: The river used to be clean. The air is badly polluted. Were trying to save the earth. Important points: 1. Let students know our earth is badly polluted. 2. Show students different kinds of pollution and how they are caused. 3. Discuss with students what we can do to help to save the earth. Difficult points: Make conversations to talk about the pollutions you know and the things you can do to help. Teaching tools: Multimedia Teaching steps: Step One: Lead in T: Today is cool, it is very comfortable. Unfortunately, the air isnt fresh and clean. Look! We need this. (Show a mask to students) Step Two: Presentation 1. Show Ss some pictures in which people are suffering from polluted air. Let Ss know that this is air pollution. 2. Show Ss two pictures of the same river in different time, let Ss describe what is used to be like and what it is like now. Let Ss know that this is called water pollution. 3. Show Ss some pictures in which lots of cars are on the road, it is very noisy. Also, some people speak too loudly in public, it is noisy too. Tell Ss we call it noisy pollution. 4. Do 1a. Make Ss write down the words in the right place. Check the answer. 5. Do 1b. Listen and complete the sentences. Check the answer. 6. Pair work. Role-play the conversation in 1b. Then make your own conversations about the kinds of pollution in 1a. 7. Do 2a and 2b. Listen to the interview. Circle the kinds of pollution that Jason and Susan talk about in 1a. Listen again and complete the sentences in 2b. 8. Group work. Act out the conversations in 2a/2b and 2d in groups of three. 9. Extension Think over: as teenagers, what can we do to help to save the earth? (Stop riding in cars; turn off the lights/ TV/ computers when we leave the room) Step Three: Conclusion Conclude the main content of this class. Homework: 1. The earth is badly polluted. Please make a poster to let people know that. 2. Make a shopping bag or napkin for your family and friends.