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1、精品文檔，僅供學(xué)習(xí)與交流，如有侵權(quán)請(qǐng)聯(lián)系網(wǎng)站刪除 Unit4 Global Warming Teaching aims: To make students realize the harm of global warming and how to protect the earth from global warming ; To develop students’ sense of cooperative ability; Teaching important points : To enable students to learn about global

2、 warming and to develop their reading ability. Teaching difficult points: To enable students to talk about what we should do to prevent global warming. Teaching aids: Multimedia Teaching procedures: Step1 Warming up Talk about weather and lead the relationship between severe cold weather and g

3、lobal warming. Then play a video and ask students to think about what the video shows so as to lead today’s topic-global warming. Step2 Talking Play a second video and the students are supposed to talk about what is happening in the video. Then the teacher comes to a conclusion: The animals’ h

4、abitats are destroyed. That means animals will die out one day. Step3 pre-reading Ask students questions: What is a greenhouse made of and used for? Have you ever seen a green house? A greenhouse is made of ______ and is used for ______________,especially during _____weather. Step4 group work A

5、sk students to work in groups to discuss how does a greenhouse work? The answer: The glass traps the heat from the sun and keeps it from escaping. So the air inside is warm. This makes the greenhouse heat up and so the plants can grow throughout the cold period. Step5 reading ? Ask students to s

6、kim the passage quickly and answer the following questions: What are the “greenhouse gases”? ? Who talked about “greenhouse effect”? ? What is greenhouse effect? ? And then check the answers. And then ask them to read it again and work in pairs to answer : Can we live without greenhouse effect?

7、? Who wrote the article? ? What’s the name of the magazine? ? What are the names of the three scientists mentioned in the article? ? What did Charles Keeling find? And do you agree with her? ? Does George Hambley agree with Dr Janice Foster? ? What does Hambley say about carbon dioxide? Step5

8、detailed reading The teacher tells that the test can be divided into 4 parts so show them a diagram and ask them to match which part with the right main idea. Step6 An activity—Make a poster Saving energy means reducing carbon dioxide, which is our duty. What should we do to slow down global wa

9、rming? Make a poster for our school that tells students various ways they can reduce the amount of carbon dioxide in the air. Step7 Homework ? Composition: ? 以“how to slow down global warming?”為題寫一篇發(fā)言稿。下面是你的發(fā)言要點(diǎn)： ? 房間無人時(shí)記得要隨手關(guān)燈，電腦和拔掉電源。 ? 隨手關(guān)緊水龍頭，洗米水或洗臉?biāo)寄軌蚶玫健? ? 購(gòu)物不用塑料袋，自帶籃子或是環(huán)保購(gòu)物袋。 ? 注意：短文必須包括所有要點(diǎn)，可以適當(dāng)發(fā)揮，詞數(shù)120字左右。 【精品文檔】第 2 頁(yè)