chemical-or-organic-farming-公開課課件

1、Chemical Or Organic Farming?,green food,organic food,1. Have you ever been to the countryside? 2. Do you know how to work on a farm?,Step 1: warming up,Lets go to the farm!,First, buy or select the seeds from the store.,Second, we need to plough or turn over the soil.,Third , we sow the seeds in the

2、 soil.,Finally, we can harvest our grain/sorghum/peanuts .,In order to improve the output of the crop, we need to rid the soil of the weed, water the crop, fertilize the soil and kill off the pest.,water the crop,rid the soil of the weed,fertilize the soil,kill off the pest,to improve the output of

3、the crop,fertilizer,How many kinds of fertilizers do farmers use? There are two kinds. They are chemical fertilizers and natural ones.,chemical fertilizers natural fertilizers,Which kind do farmers use when they are doing organic farming? Do you know about organic farming?,Reading Chemical or Organi

4、c Farming,1).化肥 2)細菌 3).對造成損害 4).洗掉某物 5).導致;造成(后果);通往 6).逐漸增強,堆積，建立 7).另外(還有) 8).使免受(影響); 使不含(有害物) 9).集中(注意力、精力)于 10).每隔幾年 11).避免做,fertilizer bacteria cause/do damage to wash off lead to build up in addition keepfree from/of focus on every few years avoid doing,First reading: get the main idea of ea

5、ch paragraph. para1:Long-term use of fertilizers can cause damage to the land and people s health para2: The problem caused by chemical fertilizers para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.,1 Why are chemical fertilizers so popular in farming today

6、? 2 After the long-term use of chemical fertilizers, what have scientists found?,Many farmers welcomed them as a great way to stop crop disease and increase production. Long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to peoples health.,Recently, however,

7、therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.,Second reading,Read paragraph 2 and find out the problems caused by using chemical fertilizers.,There are three problems.First, they can damage as well as . They also stay in the and . In addition, grow too fast to .,first;second;

8、 finally;last but not least ,etc.,Read paragraph 3-4,What are the advantages of organic farming? The farmers focus on keeping their soil rich and free of disease and keeping the air , soil, water and crops free from chemicals.,Tips: several phrases can be used.,The methods to keep the soil fertile 1

9、 using natural waste from animals as fertilizer. 2 changing the kind of crop in each field . 3 planting crops to use different levels of soil 4 planting grass between crops to prevent ,The same goal : _ _ _,to grow good food and to avoid damaging the environment or peoples health.,Language points,1.

10、 These chemicals in the food supply build up in peoples bodies over time. build up 增強; 建立；開發(fā) Hard working conditions build up character. 艱苦的工作條件能磨練人的性格。 He built up his strength again after an illness. 他病后逐步恢復體力。,2. Many of these chemicals can lead to cancer or other illnesses. lead to: 導致；造成(后果） To

11、o much work and too little rest often lead to illness. 過量的工作和過少的休息會引起疾病。 All roads lead to Rome. 條條大道通羅馬。,通往,即學即練 用lead to的適當形式完成句子。 1. Students should always remember that hard work is the main way which _ success. 2. The bad weather _ a terrible accident a few days ago.,leads to,led to,聯(lián)想 result i

12、n引起(某種結果)、使獲得(某種成果)、結果。如： The accident resulted in two deaths. result from由造成、因而產(chǎn)生。如： Sickness sometimes results from eating too much.,含介詞to的東側短語： come to 來到，蘇醒 refer to 參考， 涉及 look forward to 盼望 pay attention to 注意,stick to 堅持 devote to 致力于 turn to get close to 靠近,3. They focus on keeping their soi

13、l rich and free of disease. focus on:集中(注意力，精力等）于 Focus on life. focus ones attention on 集中注意力于 focus ones mind on 把心思集中到上 You should focus your attention on your work. 你應該把注意力集中在你的工作上。 EW他需要更集中于他的事業(yè)。 He needs to focus more on his career.,瞄準生活。,4. reduce vt. 減少，減縮,They have to reduce expenses this y

14、ear. 他們今年必須削減開支。 搭配 reduce to 減到，降到 reduce by 減了， 降了 Please reduce_ 2% off the invoice price. The water will freeze when the thermograph reduces _ zero centigrade.,by,to,5. This also keeps the air, soil, water and crops free from chemicals.,這樣還可以讓空氣、土壤、水以及農(nóng)作物不受化學物質的污染。,keep free from/of使免受(影響/傷害等) 鍛

15、煉能使我們擺脫疾病。 Exercise can keep us free from disease. 聯(lián)合國正試圖使世界免受戰(zhàn)爭的威脅。 The United Nation is trying to keep the world free from the threat of war.,6. 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

16、.,分析 本句結構比較復雜。其主干結構為: 主句(Crops put important minerals back into the soil) + 狀語(making it ready for crops)。 狀語中又包含“make + it + 形容詞”結構和由that引導的定語從句(that need rich and fertile soil)。,7. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and th

17、en leaving it in the ground to become a natural fertilizer for the next years crop. 分析 本句的主干結構是一個簡單句, 其結構是: 主語(farmers) + 謂語(prefer) + 并列賓語(planting . + leaving .)。,其中between crops和in the ground作地點狀語。 兩個賓語后面又分別帶有一個不定式作目的狀語（to prevent wind or water from carrying away the soil和to become a natural fert

18、ilizer for the next years crop）。,para1: A new discovery of scientists. para2: Several problems caused by using chemical fertilizers. para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.,The structure of this passage,Para1 Topic,Para2 Problems,Para3 Advantages

19、,Para4 Several methods,illustration（闡明） comparison conclusion,The type of the article is_,exposition（說明文）,First reading: get the main idea of each paragraph. para1:Long-term use of fertilizers can cause damage to the land and people s health para2: The problem caused by chemical fertilizers para3: T

20、he advantages of using organic farming. para4: Some methods to keep the soil fertile.,1 Why are chemical fertilizers so popular in farming today? 2 After the long-term use of chemical fertilizers, what have scientists found?,Many farmers welcomed them as a great way to stop crop disease and increase

21、 production. Long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to peoples health.,Recently, however,therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.,Second reading,Read paragraph 2 and find out the problems caused by using chemical fer

22、tilizers.,There are three problems.First, they can damage as well as . They also stay in the and . In addition, grow too fast to .,first;second; finally;last but not least ,etc.,Read paragraph 3-4,What are the advantages of organic farming? The farmers focus on keeping their soil rich and free of di

23、sease and keeping the air , soil, water and crops free from chemicals.,Tips: several phrases can be used.,The methods to keep the soil fertile 1 using natural waste from animals as fertilizer. 2 changing the kind of crop in each field . 3 planting crops to use different levels of soil 4 planting gra

24、ss between crops to prevent ,The same goal : _ _ _,to grow good food and to avoid damaging the environment or peoples health.,Language points,1. These chemicals in the food supply build up in peoples bodies over time. build up 增強; 建立；開發(fā) Hard working conditions build up character. 艱苦的工作條件能磨練人的性格。 He

25、built up his strength again after an illness. 他病后逐步恢復體力。,2. Many of these chemicals can lead to cancer or other illnesses. lead to: 導致；造成(后果） Too much work and too little rest often lead to illness. 過量的工作和過少的休息會引起疾病。 All roads lead to Rome. 條條大道通羅馬。,通往,即學即練 用lead to的適當形式完成句子。 1. Students should alwa

26、ys remember that hard work is the main way which _ success. 2. The bad weather _ a terrible accident a few days ago.,leads to,led to,聯(lián)想 result in引起(某種結果)、使獲得(某種成果)、結果。如： The accident resulted in two deaths. result from由造成、因而產(chǎn)生。如： Sickness sometimes results from eating too much.,含介詞to的東側短語： come to 來

27、到，蘇醒 refer to 參考， 涉及 look forward to 盼望 pay attention to 注意,stick to 堅持 devote to 致力于 turn to get close to 靠近,3. They focus on keeping their soil rich and free of disease. focus on:集中(注意力，精力等）于 Focus on life. focus ones attention on 集中注意力于 focus ones mind on 把心思集中到上 You should focus your attention o

28、n your work. 你應該把注意力集中在你的工作上。 EW他需要更集中于他的事業(yè)。 He needs to focus more on his career.,瞄準生活。,4. reduce vt. 減少，減縮,They have to reduce expenses this year. 他們今年必須削減開支。 搭配 reduce to 減到，降到 reduce by 減了， 降了 Please reduce_ 2% off the invoice price. The water will freeze when the thermograph reduces _ zero cent

29、igrade.,by,to,5. This also keeps the air, soil, water and crops free from chemicals.,這樣還可以讓空氣、土壤、水以及農(nóng)作物不受化學物質的污染。,keep free from/of使免受(影響/傷害等) 鍛煉能使我們擺脫疾病。 Exercise can keep us free from disease. 聯(lián)合國正試圖使世界免受戰(zhàn)爭的威脅。 The United Nation is trying to keep the world free from the threat of war.,6. Crops suc

30、h 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.,分析 本句結構比較復雜。其主干結構為: 主句(Crops put important minerals back into the soil) + 狀語(making it ready for crops)。 狀語中又包含“make + it + 形容詞”結構和由that引導的定語從句(that need

31、rich and fertile soil)。,7. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to become a natural fertilizer for the next years crop. 分析 本句的主干結構是一個簡單句, 其結構是: 主語(farmers) + 謂語(prefer) + 并列賓語(planting . + lea

32、ving .)。,其中between crops和in the ground作地點狀語。 兩個賓語后面又分別帶有一個不定式作目的狀語（to prevent wind or water from carrying away the soil和to become a natural fertilizer for the next years crop）。,para1: A new discovery of scientists. para2: Several problems caused by using chemical fertilizers. para3: The advantages o

33、f using organic farming. para4: Some methods to keep the soil fertile.,The structure of this passage,Para1 Topic,Para2 Problems,Para3 Advantages,Para4 Several methods,illustration（闡明） comparison conclusion,The type of the article is_,exposition（說明文）,1 Why are chemical fertilizers so popular in farmi

34、ng today? 2 After the long-term use of chemical fertilizers, what have scientists found?,Many farmers welcomed them as a great way to stop crop disease and increase production. Long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to peoples health.,Recently,

35、however,therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.,Second reading,Read paragraph 2 and find out the problems caused by using chemical fertilizers.,There are three problems.First, they can damage as well as . They also stay in the and . In addition, grow too fast to .,first

36、;second; finally;last but not least ,etc.,Read paragraph 3-4,What are the advantages of organic farming? The farmers focus on keeping their soil rich and free of disease and keeping the air , soil, water and crops free from chemicals.,Tips: several phrases can be used.,The methods to keep the soil f

37、ertile 1 using natural waste from animals as fertilizer. 2 changing the kind of crop in each field . 3 planting crops to use different levels of soil 4 planting grass between crops to prevent ,The same goal : _ _ _,to grow good food and to avoid damaging the environment or peoples health.,para1: A n

38、ew discovery of scientists. para2: Several problems caused by using chemical fertilizers. para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.,The structure of this passage,Para1 Topic,Para2 Problems,Para3 Advantages,Para4 Several methods,illustration（闡明） com

39、parison conclusion,The type of the article is_,exposition（說明文）,Language points,1. These chemicals in the food supply build up in peoples bodies over time. build up 增強; 建立；開發(fā) Hard working conditions build up character. 艱苦的工作條件能磨練人的性格。 He built up his strength again after an illness. 他病后逐步恢復體力。,2. Man

40、y of these chemicals can lead to cancer or other illnesses. lead to: 導致；造成(后果） Too much work and too little rest often lead to illness. 過量的工作和過少的休息會引起疾病。 All roads lead to Rome. 條條大道通羅馬。,通往,即學即練 用lead to的適當形式完成句子。 1. Students should always remember that hard work is the main way which _ success. 2.

41、The bad weather _ a terrible accident a few days ago.,leads to,led to,聯(lián)想 result in引起(某種結果)、使獲得(某種成果)、結果。如： The accident resulted in two deaths. result from由造成、因而產(chǎn)生。如： Sickness sometimes results from eating too much.,含介詞to的東側短語： come to 來到，蘇醒 refer to 參考， 涉及 look forward to 盼望 pay attention to 注意,sti

42、ck to 堅持 devote to 致力于 turn to get close to 靠近,3. They focus on keeping their soil rich and free of disease. focus on:集中(注意力，精力等）于 Focus on life. focus ones attention on 集中注意力于 focus ones mind on 把心思集中到上 You should focus your attention on your work. 你應該把注意力集中在你的工作上。 EW他需要更集中于他的事業(yè)。 He needs to focus

43、more on his career.,瞄準生活。,4. reduce vt. 減少，減縮,They have to reduce expenses this year. 他們今年必須削減開支。 搭配 reduce to 減到，降到 reduce by 減了， 降了 Please reduce_ 2% off the invoice price. The water will freeze when the thermograph reduces _ zero centigrade.,by,to,5. This also keeps the air, soil, water and crops

44、 free from chemicals.,這樣還可以讓空氣、土壤、水以及農(nóng)作物不受化學物質的污染。,keep free from/of使免受(影響/傷害等) 鍛煉能使我們擺脫疾病。 Exercise can keep us free from disease. 聯(lián)合國正試圖使世界免受戰(zhàn)爭的威脅。 The United Nation is trying to keep the world free from the threat of war.,6. Crops such as peas or soybeans put important minerals back into the soil

45、, making it ready for crops such as wheat or corn that need rich and fertile soil.,分析 本句結構比較復雜。其主干結構為: 主句(Crops put important minerals back into the soil) + 狀語(making it ready for crops)。 狀語中又包含“make + it + 形容詞”結構和由that引導的定語從句(that need rich and fertile soil)。,7. Some organic farmers prefer planting

46、 grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to become a natural fertilizer for the next years crop. 分析 本句的主干結構是一個簡單句, 其結構是: 主語(farmers) + 謂語(prefer) + 并列賓語(planting . + leaving .)。,其中between crops和in the ground作地點狀語。 兩個賓語后面又分別帶有一個不定式作目

47、的狀語（to prevent wind or water from carrying away the soil和to become a natural fertilizer for the next years crop）。,請以“PLASTIC OR CLOTH BAGS?”為題模仿這篇文章的篇章結構和句子結構去寫一篇說明文。,墊江報社征文:綠色行動進行中征寫與環(huán)保相關的英文文章. 導言：古往今來，地球媽媽用甘甜的乳汁哺育了無數(shù)代子孫。原來的她被小輩們裝飾得楚楚動人?？墒?，現(xiàn)在人類為了自身的利益，將她折磨得天昏地暗。人類只有一個地球；而地球正面臨著嚴峻的環(huán)境危機。“救救地球”已成為世界各國

48、人民最強烈的呼聲。我們大家都喜歡藍藍的天空，清澈的湖水，新鮮的空氣，渴望生活在鳥語花香里，希望我們的家園更美麗。要想實現(xiàn)這些我們墊江人現(xiàn)在就應該開始行動了。 以“Plastic or Cloth Bags?”為題寫一篇說明文。(請模仿這篇文章的篇章結構和句子結構),使用塑料袋的害處有： 1.“白色污染”的主要來源； 2.不可回收再利用； 3.燃燒污染空氣； 4.埋掉(200年不會溶解)污染土壤和地下水。使用環(huán)保袋的好處有： 1.可以大量減少塑料袋的使用； 2.使用壽命比紙袋長； 3.可以循環(huán)利用； 4.價格低廉，易于推廣。,para1: A new discovery of scientist

49、s. para2: Several problems caused by using chemical fertilizers. para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.,The structure of this passage,Para1 Topic,Para2 Problems,Para3 Advantages,Para4 Several methods,illustration（闡明） comparison conclusion,The type of the article is_,exposition（說明文）,para1: A new discovery of scientists. para2: Several problems caused by using chemical fertilizers. para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.,The structure of this passage,Para1 Topic,Para2 Problems,Para3 Adv