unit2 chemical or organic farmingPPT精品文檔

1、.1.2Reading .3 Organic Farming.4 What is the matter we put on the soil which makes crops grow ? It is fertilizer. .5chemical fertilizers natural fertilizers.6Scanning 1. What is organic farming? Farming without using chemicals. 2. What is the goal of using organic farming methods? To grow good food

2、and avoid damaging the environment or peoples health.7Long-term use of chemical fertilizers can cause damage to the land and peoples health. Farmers and customers turn to organic farming.Other methods to keep the soil fertile. Skimming Problems caused by chemical fertilizersMain ideaP1.P2.P3.P4.81 W

3、hy are chemical fertilizers so popular in farming today? They are a great way to stop crop disease and increase production.Read the passage and answer the following questions.92 What problems can be caused by using chemical fertilizers?They can damage the land by killing helpful bacteria and pets an

4、d by staying in the ground and underground water for a long time. They damage peoples health by building up in their bodies and leading to cancer or other illnesses.103 What is organic farming?4 What is the main reason for using organic farming methods? Organic farming means growing cropswithout usi

5、ng any chemicals.The main reason for using organic farming methods is to grow good food and to avoid damaging the environment or peoples health. .11Find and write down the methods and advantages in the passage.12.13.14Main idea of the passage Chemical fertilizers can cause many problems, so organic

6、farming is becoming more popular.15Underline and rewording topic sentencesPara1: In recent days, scientists have discovered that using chemical fertilizers for a long time can hurt the land and also peoples health.Para2: There are several problems caused by chemical fertilizers.16Para3: Organic farm

7、ing is becoming more popular with some farmers and many customers after these discoveries came out.Para4: There are many organic farming methods for making the land healthy and productive.17Expressions 1.化肥化肥2.對對造成損害造成損害3.洗掉某物洗掉某物4.導(dǎo)致導(dǎo)致;造成造成(后果后果);通往通往5.逐漸增強逐漸增強,建立建立6.另外另外(還有還有)7.使使免受免受(影響影響); 使使不含不

8、含(有害物有害物)8.集中集中(注意力、精力注意力、精力)于于9.每隔幾年每隔幾年10.避免做避免做chemical fertilizerscause/do damage towash offlead tobulid upin addition (to)keepfree from/offocus onevery few yearsavoid doing.18Language points1 These chemicals in the food supply build up in peoples bodies over time.build up 增強增強; 建立；開發(fā)建立；開發(fā) Hard

9、working conditions build upcharacter. 艱苦的工作條件能磨練人的性格。艱苦的工作條件能磨練人的性格。 .19vbuild up 衍生結(jié)構(gòu)：衍生結(jié)構(gòu)：v增強體質(zhì)：增強體質(zhì)：v建立名聲：建立名聲：v增進健康：增進健康：.20vbuild up 衍生結(jié)構(gòu)：衍生結(jié)構(gòu)：v增強體質(zhì)：增強體質(zhì)：build oneself upv建立名聲：建立名聲：build up a famev增進健康：增進健康：build up ones health/body.212 Many of these chemicals can lead to cancer or other illnes

10、ses.lead to: 導(dǎo)致；造成導(dǎo)致；造成 過量的工作和過少的休息會引起疾病。過量的工作和過少的休息會引起疾病。條條大道通羅馬。條條大道通羅馬。Too much work and too little restoften lead to illness.All roads lead to Rome. .223 They focus on keeping their soil rich and free of disease.focus on:集中集中(注意力，精力等）于注意力，精力等）于thoughts, minds, eyes把注意力集中在你的工作上。把注意力集中在你的工作上。You s

11、hould focus your attention on your work.the focus of attention關(guān)注的焦點關(guān)注的焦點 .23vpay attention to doing sthvput ones heart into sthvfix ones attention on sthvconcentrate ones attention on vfocus ones eyes/attention/thoughts/minds onbe addicted to doing sth 沉溺于做某事沉溺于做某事be absorbed /lost/buried in doing s

12、th 專心于專心于.集中精力集中精力/注意力注意力于于.244. confuse The twins look so much alike that they confused me. Be careful not to confuse safety with/and safely.i was getting confused by such a confusing question.If you are confused about anything, just call me at any time. vt. 使迷惑；使為難使迷惑；使為難be confused about 對對.感到困惑感

13、到困惑confuse A with /and B 把把A與與B搞混搞混淆淆confusing/puzzling adj. 令人困惑令人困惑的的.255.supply.1) 用作名詞時：用作名詞時：a) 指指“供給供給;供應(yīng)供應(yīng)”等等,其反義詞為其反義詞為demand (需求需求)。 supply and demand 供與求供與求 be in short supply 供應(yīng)缺乏供應(yīng)缺乏,供應(yīng)不足供應(yīng)不足 food supply 食物供應(yīng)食物供應(yīng) water supply 供水供水.262) 用作動詞時用作動詞時,指指“供給供給,提供提供,備辦備辦”等等, supply sb._ sth , s

14、th._ sb. withto /for offer provide sth _ sb sb _ sth to for withsth _ sbsb _ sth.27When I meet difficulty, my roommates will_me help.offer The government need to _ food and clothes for these old peopleprovideAll the rooms are _ with electric lights.A. supplied B. given C. offered D. burnt.28此次演講給我提供

15、了表現(xiàn)自我的好機會。有機農(nóng)業(yè)為人類提供健康安全的食品。老師對我的學(xué)習(xí)提供重要幫助。The speech provided me with a good oppotunity to show myself. The organic farming supplies healthy and safe food to/for human beings. The teacher offer important help to me. .296. A healthy soil reduces diseases and helps crops grow strong and healthy. reduce

16、 . to . 減少到.reduce. by 減少了.be reduced to 陷入某種境地 目前為止，勞動力已經(jīng)減少了一半。目前為止，勞動力已經(jīng)減少了一半。這個地區(qū)的人口減少到這個地區(qū)的人口減少到20萬。萬。她淪落到乞丐這種她淪落到乞丐這種 地步。地步。Up to now, the workforce has been reduced by half. The population in this area has been reduced to 200,000. She wa reduced to a begger. reduce. vt. 減少；縮減= decrease/decline

17、 (vi.).306. Crops such as peas or soybeans put important minerals back into the soil, making it ready for crops such as wheat or corn that need rich and fertile soil. .31現(xiàn)在分詞引導(dǎo)結(jié)果狀語從句表示現(xiàn)在分詞引導(dǎo)結(jié)果狀語從句表示自然而然意料自然而然意料之中的結(jié)果之中的結(jié)果。vI got up late, so i missed the bus.vI got up late, missing the bus.vHe was cau

18、ght in the rain, thus it made himself catch cold.vHe was caught in the rain, making himself catch cold.32to do短語引導(dǎo)結(jié)果狀語從句表示短語引導(dǎo)結(jié)果狀語從句表示意料之意料之外的結(jié)果外的結(jié)果。vHe hurried to the airport, only to be told that the plane had taken off.vI went to the school, only to find today was Sunday.33現(xiàn)在完成進行時現(xiàn)在完成進行時have/has

19、been doingv一年以來我們一直在學(xué)習(xí)。一年以來我們一直在學(xué)習(xí)。vwe have been studying for one year.v我一直我一直在為世界擺脫食品危機而奮斗在為世界擺脫食品危機而奮斗。vI have been struggling to rid the world of food crisis. v近來，科學(xué)家們發(fā)現(xiàn)長期使用化肥會對土地造成損近來，科學(xué)家們發(fā)現(xiàn)長期使用化肥會對土地造成損害，甚至更危險的是，會對人們的健康造成危害。害，甚至更危險的是，會對人們的健康造成危害。vRecently, scientists have been finding that long

20、-term use of chemical fertilizers can cause damage to the land, and even more dangerous, to peoples health. 一直在做某事一直在做某事.34Exercises cause/do damage to, wash off, lead to, bulid up, in addition(to), keepfree from/of, focus on,avoid doing1. His mistakes _ his failure.2. These chemicals in the food su

21、pply_ in peoples bodies over time.3. 4. Please _ your mind_ the following problem.5. Children should _ violence.led tobuild upfocusonAll roads _ Rome.lead tobe kept free from.35cause/do damage to, wash off, lead to, bulid up, in addition(to), keepfree from/of, focus on,avoid doing6. He likes basketb

22、all._,he likes football. He likes basketball _football.7. Little Tom stuck to _ the mud _ his shoes by himself before he came in. 8. I tried to _(meet) him because he always bores me.9. The storm on May 3 _ great _ people in Burma so far.In additionin addition to washingoffavoid meetinghas causeddam

23、age to.36Listening .37chemical fertilizer cow dung用化學(xué)肥料和有機肥料的區(qū)別用化學(xué)肥料和有機肥料的區(qū)別:.38The possible bad effects of chemical fertilizers on the fruit and vegetablesthat we eat today.As you listen to this dialogue, keep in mind what you have just read about chemical fertilizers. What is the main topic of the

24、 conversation?.39Listen to the dialogue a second time. Decide if the following statements are true or false, according to the conversation.Give your reasons.1 Paul thinks that Carrie is not telling him the truth.2 Using chemical fertilizers always makes vegetables empty inside.TrueFalse.403 Todays f

25、ruit is not as healthy for people as fruit fifty years ago.4 Eating more vegetables might not always be good for us.5 All of todays vegetables look healthy but in fact are not.FalseTrueTrue.41Listening text WHATS WRONG WITH THEVEGETABLES?Girl: Hey, Paul, listen to this a magazine article about a far

26、mer who used too much chemical fertilizer on his fields. When his vegetables were picked, they were all found to be empty!.42BOY: Empty? Youre joking, Carrie that cant be true!Girl: I didnt believe it either! This article says this can happen sometimes with vegetables like cucumbers, carrots and pum

27、pkins. This chemical fertilizer makes the vegetables grow fast to look big and beautiful, but theyre empty inside! .43 BOY: You know, Ive noticed that sometimes my mum buys carrots from the supermarket that have big holes down the center. I guess that must be from using chemical fertilizers! GIRL: Y

28、eah, thats what the magazine says! The main point of the article, though, isnt about holes in our vegetables. .44 Its talking about why the fruit and vegetables we eat today arent as nutritious as the ones our grandparents ate.BOY: What? My mum is always telling me to eat more vegetables, because th

29、eyre good for me!GIRL: Yeah, I know my mother says that same thing! And its true -.45they are good for us but the problem is that they arent healthy enough! All these chemical fertilizers they kill off both the bad and the good things in the ground. The ground doesnt have enough vitamins and mineral

30、s any more to help crops grow healthy.46BOY: So if our fruit and vegetables were grown with chemical fertilizers, they might look healthy, but probably arent really healthy? I guess weve got to stop using so many chemical fertilizers to grow our food!.47Speaking.48The farmer is persuading the custom

31、er to buy his/her “green food”. You need to The advantages are Id prefer because Whats the advantage of Should I/we.?.49Its better ofIts more expensive but I dont like becauseId ratherThis is good value becauseYoull taste the difference whenIf I have a choice Ill chooseIts a great pity that.50Sample

32、 dialogue:F= Farmer C= CustomerF: Good morning! Would you like some organic carrots this morning?C: Hmm Theyre a little expensive! What is the advantage of ？.51F: The advantage of these vegetables is that they are green food so theyre safe to eat and good for your family.C: But whats the advantage o

33、f having green food? I know all vegetables are good for you and those down the road look green too. And I can buy them at half the price there.52F: Well, let me explain. Id rather feed my family on green food than other vegetables because they are grown without chemical fertilizers.C: But the price is too expensive! Id prefer to buy good food if I can afford it.53F: This is good value for money because youll have healthier children. They wont have to take time off work. In the long run youll be benefit.C: Certainly Id