Unit 4《Global Warming》说课稿2(人教版选修6)(3)

(2) It was back home after the experiment. A. not until midnight did he go B. until midnight that he didn’t go C .not until midnight that he went D. until midnight when he didn’t go (3) Why !I have nothing to confess. you want me to say? A. What is it that B. What it is that C. How is it that D. How it is that

(4) It is these poisonous products can cause the symptoms(症状)of the flu ,such as headache and aching muscles. A. who B. that C. how D. what

(5) It was because of bad weather the football match had to be put off. A. so B. so that C. why D. that

(6) It was for this reason her uncle moved out of New York and settled down in a small village. A. which B. why C. that D. how

(7) It is the ability to do the job matter not where you come from or what you are. A. it B. that C. one D. this

(8) It was how the young man had learned five foreign languages attracted the audience’s interest. A. so that B. that C. what D. in which (9) It was he said disappointed me. A. what; that B. that; that C. what; what D. that ;what (10) It was not until 1920 regular radio broadcasts began. A. while B. which C. that D. since Suggested Answers: (1)～(5) DCABD (6)～(10) CBBAC Step 4. Homework

Rewrite each sentence with “It is …that…”to give more emphasis to the underlined part. 1. Greenhouse gases have warmed the earth by trapping heat energy in the atmosphere. 2. The greenhouse effect gives the earth’s surface the average temperature of 15℃. 3. Much of the energy used to light and heat our homes comes from fossil fuels. 4. The biggest producer of greenhouse gases is the United States of America.

5. Carbon dioxide stays in the atmosphere for centuries while other greenhouse gases stay in the atmosphere only for a day or less. 6. Low-lying countries feel their very existence is in danger from rising sea levels. 7. Many scientists believe that human activities have caused the earth’s temperature to rise.

8. Scientists want to find out about future climate changes and their effects on our environment.

9. In the years ahead, the level of the sea could rise by several meters because of global warming.

10. In the future outer space might provide us with new energy sources.

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…have 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 Coal煤炭能源 Gas石油能源 Nuclear核能源 Renewable可再生能源 Solar太阳能 Wind风能 Hydro-electric水电能源 Geothermal地热能源 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.

Period 5 Learning Tip & Summing Up

Teaching Goals:

1. To summarize what has been learnt.

2. To learn what nouns are spelt with a capital letter at the beginning of the word. Teaching Procedures: Step 1. Learning tip 1. Group work

Ask Ss to discuss the reading material with their partners in groups of four. 2. Conclusion

Nouns that are spelt with a capital letter at the beginning of the word: (1) names of people and place

(2) titles of magazines, newspapers, stories and books (3) a person’s title (4) months of year (5) nationalities (6) holidays …

Step 2. Summing Up

Think about what you have read and practiced in this unit. Then tick the boxes. global warming some ways that individuals can reduce carbon dioxide content in the air different forms of energy new vocabulary and expressions how to use“it ”for emphasis in a sentence phrases I can use to express I have learned this well I need to learn more agreement or disagreement Step 4. Homework Finish the exercises in the Workbook.

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