Book 6 Unit4教案reading and writing.docx

1、Book 6 Unit4教案reading and writing Unit Four Global WarmingPeriod Three Warming-up and Reading 主备人：戎金荣 审核人：高二全组 使用人： 使用日期：Teaching contents（教学内容）: Warming up and Reading The earth is becoming warmer- but does it matter?Teaching Aims(教学目标): 1.To read about global warming.2.To get some idea about the e

2、ffect of global warming.3.To develop some basic reading skills.Teaching emphasis（教学重点）: 1.Fully understand the reading passage.2.Master important words, phrases and writing patterns. 3. Develop the students reading and writing ability.Teaching methods（教学方法）1. Students-centered 2. Task-based approach

3、, 3. Multi-media（多媒体）4.Individual work; Cooperative learning Teaching Procedures（教学过程）:Teaching Content Ways of TeachingStep 1 ： RevisionReview the important words and phrases in the text.Step 2. Warming UpPurpose: To arouse Ss interest in learning about global warming.1. Team workAnswer the questio

4、ns below:(1) Have you ever seen a greenhouse?(2) How does a greenhouse work?(3) What do you think greenhouse gases do?2. Group work Look at the picture, and ask Ss some questions.T: What is this building made of? S1: Its made of plastic.T: Whats its purpose?S2: Plants can grow in it when its cold ou

5、tside.T: How does it work?S3: The glass traps the heat from the sun, making the air warm so that plants grow better.Step 3 ：Pre-readingPurpose: To get Ss to learn about greenhouse gases.1. Group workNow look at the word “GREENHOUSE GASES”. What does it mean?Greenhouse gases (GHG) are gaseous compone

6、nts of the atmosphere that contribute to the greenhouse effect .The major natural greenhouse gases are water vapor, which causes about 36-70% of the greenhouse effect on Earth (not including clouds): carbon dioxide, which causes between 9-26%; and ozone, which causes between 3-7%(note that it is not

7、 really possible to assert that such-and-such a gas causes a certain percentage of the GHE, because the influences of the various gases are not additive .The higher ends of the ranges quoted are for the gas alone ;the lower end ,for the gas counting overlaps).Naturally occurring greenhouse gases inc

8、lude water vapor, carbon dioxide, methane, nitrousoxide, and ozone. Certain human activities, however, add to the levels of most of these naturally occurring gases.Very powerful greenhouse gases that are not naturally occurring include hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur h

9、exafluoride (SF6), which are generated in a variety of industrial processes.Each greenhouse gas differs in its ability to absorb heat in the atmosphere. HFCs and PFCsare the most heat-absorbent.2. Individual workGet Ss to answer these questions individually. Then let them discuss the answers.(1) Who

10、 wrote the magazine article? What is the name of the magazine?(2) What are the names of the three scientists mentioned in the article?(3) What do they think about global warming? Do they agree with one another?(4) What are the two graphs about?(5) What is the main topic of the article?Step 4 ：Homewo

11、rk1. Let students read the passage carefully.2. Let students preview the text. Work in groupsPair work Group work Give the Ss 5 minutes to discuss in groups.Unit Four Global WarmingPeriod Four Reading 主备人：戎金荣 审核人：高二全组 使用人： 使用日期：Teaching contents（教学内容）: Reading The earth is becoming warmer- but does

12、it matter?Teaching Aims(教学目标): 1.Grasp some words and phrases related to global warming.2.Train the students to master some reading strategies of scanning, skimming and finding out useful information. 3.3.Encourage the students to take an active part in English study, develop their sense of co-opera

13、tion.Teaching emphasis（教学重点）: 1.Help the students learn how to talk about global warming. 2.Enable the students to talk about their opinions about the ways of dealing reducing global warming.Teaching methods（教学方法）1.Skimming and scanning; individual, pair or group work; discussion.2.A recorder, a com

14、puter, a projector .Teaching Procedures（教学过程）:Teaching StepsWays of TeachingStep 1 ： RevisionReview the important words and phrases in the text.Step 2 ： Check the homework3. Let some students read the passage loudly to see whether they have read it carefully or not.4. Open the books to see whether t

15、hey have preview the text.Step 3 ：SkimmingPurpose: To get a brief understanding of the text.Read through the text, preferably the first and the last sentences of each paragraph and write the key sentence of each paragraph.Key sentences of each paragraph:(1) A debate over whether it is human activity

16、 that has caused the global warming or whether it is just a natural phenomenon.(2) Many scientists believe people have caused the increase in the earths temperature.(3) The increased extra amount of carbon dioxide traps more heat energy causing the global temperature to go up.(4) The levels of carbo

17、n dioxide have increased greatly over the last 100 to 150 years.(5) There are some different attitudes towards the causes of this increase in carbon dioxide.(6) Over the next 100 years the amount of warming could be as low as 1 to 1.5 degrees Celsius but it could be as much as 5 degrees Celsius.(7)

18、An increase of five degrees would be a catastrophe.(8) Future warming would cause the sea level to rise by several meters.(9) Some predict any warming will be mild with few bad environmental consequences.(10) More carbon dioxide is a positive thing.(11) No one knows what the effects of global warmin

19、g will be.Step 4：ScanningPurpose: To get Ss to have some details in the text.Read the article carefully. Are these statements true or false? Write a T for each true sentence and an F for each false sentence.(1) The temperature last century didnt increase much. ( )(2) Everyone believes that global wa

20、rming is caused by the activities of humans. ( )(3) Janice Foster believes that burning fossil fuels causes global warming. ( )(4) Natural gas is a greenhouse gas. ( )(5) Carbon dioxide is a byproduct of burning fossil fuels. ( )(6) People accept Charles Keeling s data because he took accurate measu

21、rements. ( )(7) Flooding could be one of the effects of future global warming. ( )(8) George Hambley believes scientists are just guessing about the effects of global warming.( )(9) Geroge Hambley is worried about the effects of carbon dioxide on plant growth. ( )(10) It is clear what the effects of

22、 global warming will be. ( )Suggested Answers:(1) F (2) F (3) T (4) F (5) T (6) T (7) T (8) T (9) F (10) FStep 5：ScanningPurpose: To train Ss listening ability.Listen to the tape and follow it in a low voice.Part 1 (Paragraph 1)(1) compare 比较 常见用法： comparewith 把和比较Compared with him, I am fast. compa

23、reto 把比作Life is often compared to voyage.(2) come about发生How did it come about? 那事是怎么发生的?Part 2 (Paragraph 2, 3, 4)(1) fuel n 燃料Dont leave the engine switched on .It wastes fuel.拓展：fuel v 加油；补给燃料The car is being fuelled ready to try to beat the speed record.(2) quantities of大量Large quantities of mon

24、ey have been spent on the bridge.拓展： a large quantity of大量的He ate a large quantity of nice.(3) per prep 每; 每一The fruit costs 30 pence per kilo.How much do you earn per week? Part 3 (Paragraph 5,6,7,8,9)(1) data n 资料; 数据We havent got enough data.(2) result in导致The accident resulted in the death of tw

25、o passengers.It resulted in success.拓展：result from 由于His illness resulted from eating bad food.(3) catastrophe n 突如其来的大灾难；大灾祸The war was a terrible catastrophe in which many people died.(4) climate n 气候We have a mild climate here. (5) consequence n 结果；后果；影响As a consequence of being in hospital, Shel

26、ly decided that she wanted to become a nurse. 常见词组：in consequence 因此，由此in consequence of 由于的缘故(6) state vt 陈述；说明The busmen have stated that the strike will continue until general agreement is reached about pay and working conditions.(7) range n & v 种类；范围；幅度There is a wide range of temperature.气温变化很大

27、。 vi (在一定范围内)变化The number ranges between 5 and 15. vt 排列，整理Please range the goods neatly in the shop window. Part 4 (Paragraph 10)(1) build up逐步建立；增加；增进We need to build up our reputation.Traffic is building up on roads into the city.(2) Keep on 继续 Price kept on increasing. He didnt stop running; he

28、just kept on.拓展：keep on doing与keep doing的区别：keep on doing表示动作反复发生；keep doing表示状态或动作的持续。He kept standing there for half an hour without moving.他一动不动地在那里站了半个小时。Step 6. Post-readingPurpose: To have a deep understanding of the text.1. Now you are going to discuss the statement: Weshould do nothing about

29、 global warming. Follow these instructions:(1) Get into groups of six. Decide which three in your group are going to agree with the statement 2. Ask Ss to answer the following questions. Present their opinions to other classmates.(1) What do you think of global warming?(2) Do you think it serious?St

30、ep 7：Read the passage loudlyRead the passage in class loudly and fluently, paying attention to the important sentences and phrases.1.Listen to the recorder of the passage.2.Answer the questions on the learning book.Step 8: Summarize about this lesson and set the homework.(班长总结并布置作业）1.The monitor of

31、English summarize the lesson and announce the good team and best students.2.The teacher point out the advantages of this lesson.3.Set the homework: Homework1.Read the text carefully after class.2.Do the exercises on Page47.Pick out some students to recite the phrases in English or ChineseIndividual workPraise the good group and the good students.T Work in groupsLet more students take part in the discussion and the presentation.Group work Give the Ss 5 minutes to discuss in groups.Pair workRead the passage qui