2022年英語Unit4GlobalWarming教案

1、- 1 - unit4 global warming-reading（教案）teaching goals 1. target language a. key words and phrasesconsume, come about, graph, random, phenomenon, subscribe to, fuel, quantities of, tend, go up, per, data, result in, trend, catastrophe, flood, be opposed to, mild, consequence, state, range, even if, ke

2、ep on, glance at, steady, b. important sentence patternsthere is no doubt that the earth is becoming warmer. p26without the “greenhouse effect ” , the earth would be about thirty-three degrees celsius cooler than it is. p26they also agree that it is the burning of more and more fossil fuels that has

3、 resulted in this increase in carbon dioxide. p262. ability goals enable the students to know something about energy resources and something that use energy, read the text for details and catch the specific information as much as possible, and talk about the causes and effects of global warming.3. l

4、earning ability goals enable the students to have a discussion about the causes and effects of global warming and express their own ideas about what people should do about it.teaching important pointshelp the students learn how to debate over the topic “we should do nothing about global warming.”tea

5、ching difficult points enable the students to learn the writing skills of the text and get a better understanding of articles of this kind.teaching methods reading, speaking and group work.teaching aids multimedia teaching procedures & ways step1 greetings 精品學(xué)習(xí)資料 可選擇p d f - - - - - - - - - - - -

6、 - - 第 1 頁，共 5 頁 - - - - - - - - - 2 - good afternoon，everyone. i m very happy to be here together with you. i hope you will enjoy this class. step 2 leading inas we all know, we depend on energy to do many things in our daily lives. what things use energy around us? (light, computer, fridge, hairdr

7、yer, television, washing machine, electric-bike, bus, car, motor-bike and so on.)since energy is so important for us, can you tell me some sources of energy? are they renewable or non-renewable? (show some pictures to help). from the above, we know some sources are renewable, but some are non-renewa

8、ble, so we must save energy. before reading, lets learn something related to global warming.step 3 pre-readingshow a picture of greenhouse on the screen and ask the students some questions.1. what is it in the picture? (a greenhouse).2. what is it used for? (a greenhouse is made of glass and is used

9、 for growing plants, especially during cold weather). 3. how does it work? (the air inside is warm because the glass traps the heat from the sun and keeps it from escaping. this makes the greenhouse heat up and so the plants can grow throughout the cold period). today we aren t going to talk about g

10、reenhouse, but we are going to talk about greenhouse gases. 4. what are greenhouse gases? (in the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, including carbon dioxide, methane and water vapor).5. what do you think greenhouse gases do? (they trap heat from t

11、he sun and therefore warm the earth).explain: yes. this is called the greenhouse effect. because of the greenhouse effect, our earth is becoming warmer and warmer. does it matter? whatre your opinions? this is the topic today we are going to learn: “the earth is becoming warmer but does it matter? ”

12、 it is an article from a magazine. at first, please read it quickly, and then answer the following questions. step 4 fast-readingget the students to read the passage fast and meanwhile help the students form a good habit of reading. skim the article and answer the following questions: 精品學(xué)習(xí)資料 可選擇p d

13、f - - - - - - - - - - - - - - 第 2 頁，共 5 頁 - - - - - - - - - 3 - 1. who wrote the article? (sophie armstrong) 2. what is the name of the magazine? (earth care) 3. what are the names of the three scientists mentioned in the article? (dr. janice foster, charles keeling, george hambley) 4. what do the 3

14、 scientists think about global warming? (dr. janice foster thinks the effects of global warming could be very serious. george hambley thinks global warming will be mild with few bad environmental consequences. charles keeling believes it is the burning of more and more fossil fuels that has resulted

15、 in a big increase in carbon dioxide.) 5. what is the main topic of the article? (global warming/ the warming of the earth.) before reading the article, you can look through the questions first. read as quickly as possible. you don t have to read every word. here s tip for you: tip: in english, some

16、 nouns begin with a capital letter, such as names of people and places, titles of magazines, newspapers, stories and books, etc. step 5 detailed reading now let s read the text again for some details. read the article again carefully and find out the following statements are true or false 1). it is

17、believed that global warming is caused by the activities of humans. ( ) 2).janice foster believes that she can measure the future global rise in temperature. ( ) 3). the rise in carbon dioxide is causing a steady increase in global warming.（）4). george hambley believes that global warming will do go

18、od rather than harm to the earth. ( ) 5). it is clear what the effects of global warming will be. ( ) (t, f, t, t, f ) step 6. structure main ideas and writing skills of the passage now let s learn the text on the whole. analyze the structure, main ideas and writing skills. 精品學(xué)習(xí)資料 可選擇p d f - - - - -

19、 - - - - - - - - - 第 3 頁，共 5 頁 - - - - - - - - - 4 - 1. what is the writing style? ( a ) a. expositive (說明文 ) b. practical (應(yīng)用文）c. argumentative (議論文）d. narrative（記敘文）as usual an expositive essay includes four parts-title, introduction, body, and conclusion. the first paragraph is introduction, the

20、last paragraph is conclusion, and the middle part is body. now, please divide our text into several parts. how many parts can the text be divided into? ( 4 parts : part 1-para 1; part 2- para2,3,4; part3-para 5; part4-para6 ). we have known the structure of the text, and next, let slook at the main

21、idea of each part. look through the text and then finish the task on the screen. 2. match the parts with the main ideas: part1 explain how global warming comes about part2 introduce the topic of global warming. part3 it s up to readers to think and decide whether people should do something about glo

22、bal warming or not. part4 list two different attitudes among scientists towards global warming. in this article, there are many writing skills. please find them out, and then finish the task on the screen. 3. match the parts with the writing skills: part1 using a question, leaving readers to think o

23、ver the issue part2 giving examples, using graphs, explanation part3 giving examples, making contrast (comparison) part4 raising a question these writing skills are very useful, if you don t know how to write an expositive article, you can use the skills. step 7 discussion from the text we know that

24、 there are some very different attitudes among scientists towards the effects of global warming. some think the effects will be terrible, while some others believe that we should not worry about it. what s your opinion? now let s have a discussion about the statement: “weshould do nothing about glob

25、al 精品學(xué)習(xí)資料 可選擇p d f - - - - - - - - - - - - - - 第 4 頁，共 5 頁 - - - - - - - - - 5 - warming” . do you think so? whats your opinion? you can have a discussion in groups of six. before discussing, you must follow these instructions.put the following instructions on the screen. 1. get into groups of six. decide which three in your group are going to agree with the statement (group a) and which three are going to disagree with the statement (group b). 2. group a discuss why they agree with the statement; group b discuss why they disagree. 3. group a and b get toget