chemicalororganicfarming公开课PPT学习教案

1、会计学1chemicalororganicfarming公开课公开课 green food organic food 第1页/共63页1. Have you ever been to the countryside?2. Do you know how to work on a farm? Step 1: warming up Step 1: warming upLets go to the farm!第2页/共63页第3页/共63页First, buy or select the seeds from the store.第4页/共63页Second, we need to plough o

2、r turn over the soil.第5页/共63页Third , we sow the seeds in the soil.第6页/共63页Finally, we can harvest our grain/sorghum/peanuts . 第7页/共63页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 croprid the soil o

3、f the weedfertilize the soilkill off the pest to improve the output of the crop 第8页/共63页fertilizer How many kinds of fertilizers do farmers use? There are two kinds. They are chemical fertilizers and natural ones. 第9页/共63页 Which kind do farmers use when they are doing organic farming? Do you know ab

4、out organic farming? Reading Chemical or Organic Farming 第10页/共63页1).化肥2)细菌3).对造成损害4).洗掉某物5).导致;造成(后果);通往6).逐渐增强,堆积，建立7).另外(还有)8).使免受(影响); 使不含(有害物)9).集中(注意力、精力)于10).每隔几年11).避免做fertilizerbacteriacause/do damage to wash offlead to build up in addition keepfree from/of focus on every few years avoid do

5、ing第11页/共63页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: The advantages of using organic farming. para4: Some methods to keep the soil fertile.第12页/共63页1

6、 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 production.Long-term use of chemical fertilizers can cause damage to the land and , eve

7、n more dangerous, to peoples health.Recently, however, therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.Second reading第13页/共63页 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

8、stay in the and . In addition, grow too fast to . first;second; finally;last but not least ,etc.第14页/共63页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.Tip

9、s: several phrases can be used.第15页/共63页 The methods to keep the soil fertile1 using natural waste from animals as fertilizer. 2 changing the kind of crop in each field .3 planting crops to use different levels of soil4 planting grass between crops to prevent The same goal : _ to grow good food and

10、to avoid damaging the environment or peoples health.第16页/共63页第17页/共63页2. Many of these chemicals can lead to cancer or other illnesses.lead to: 导致；造成导致；造成(后果）后果）Too much work and too little rest often lead to illness. 过量的工作和过少的休息会引起疾病。过量的工作和过少的休息会引起疾病。All roads lead to Rome. 条条大道通罗马。条条大道通罗马。通往通往即学即练

11、即学即练 用用lead to的适当形式完成句子。的适当形式完成句子。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 toled to第18页/共63页联想联想 result in引起引起(某种结果某种结果)、使获得、使获得(某种成果某种成果)、结果、结果。如：。如：The accident resulted in two deaths.result from

12、由由造成、因造成、因而产生。如：而产生。如：Sickness sometimes results from eating too much.含介词含介词to的东侧短语：的东侧短语：come to 来到，苏醒来到，苏醒refer to 参考，参考， 涉及涉及look forward to 盼望盼望pay attention to 注意注意stick to 坚持坚持devote to 致力于致力于turn to get close to 靠近靠近第19页/共63页瞄准生活。瞄准生活。第20页/共63页第21页/共63页这样还可以让空气、土壤、水以及农作物不受化学物质的污染。这样还可以让空气、土壤、

13、水以及农作物不受化学物质的污染。keep free from/of使使免受免受(影响影响/伤害等伤害等)锻炼能使我们摆脱疾病。锻炼能使我们摆脱疾病。Exercise can keep us free from disease. 联合国正试图使世界免受战争的威胁。联合国正试图使世界免受战争的威胁。The United Nation is trying to keep the world free from the threat of war.第22页/共63页6. Crops such as peas or soybeans put important minerals back into th

14、e soil, making it ready for crops such as wheat or corn that need rich and fertile soil. 分析分析 本句结构比较复杂。其主干结构为本句结构比较复杂。其主干结构为: 主句主句(Crops put important minerals back into the soil) + 状语状语(making it ready for crops)。状语中又包含状语中又包含“make + it + 形容词形容词”结构和由结构和由that引导的定语从句引导的定语从句(that need rich and fertile

15、soil)。 第23页/共63页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. 分析分析本句的主干结构是一个简单句本句的主干结构是一个简单句, 其结构是其结构是: 主语主语(farmers) + 谓语谓语(prefer) + 并列宾语并列宾

16、语(planting . + leaving .)。其中其中between crops和和in the ground作地点状语。作地点状语。两个宾语后面又分别带有一个不定式作目的状语（两个宾语后面又分别带有一个不定式作目的状语（to prevent wind or water from carrying away the soil和和to become a natural fertilizer for the next years crop）。）。 第24页/共63页para1: A new discovery of scientists.para2: Several problems cau

17、sed by using chemical fertilizers.para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.The structure of this passagePara1 TopicPara2 ProblemsPara3 AdvantagesPara4 Several methodsillustration（阐明）（阐明）comparison conclusionThe type of the article is_exposition（说明文

18、（说明文）第25页/共63页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: The advantages of using organic farming. para4: Some methods to keep the soil fertile.第26页/共63

19、页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 production.Long-term use of chemical fertilizers can cause damage to the land and , e

20、ven more dangerous, to peoples health.Recently, however, therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.Second reading第27页/共63页 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 als

21、o stay in the and . In addition, grow too fast to . first;second; finally;last but not least ,etc.第28页/共63页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.T

22、ips: several phrases can be used.第29页/共63页 The methods to keep the soil fertile1 using natural waste from animals as fertilizer. 2 changing the kind of crop in each field .3 planting crops to use different levels of soil4 planting grass between crops to prevent The same goal : _ to grow good food an

23、d to avoid damaging the environment or peoples health.第30页/共63页第31页/共63页2. Many of these chemicals can lead to cancer or other illnesses.lead to: 导致；造成导致；造成(后果）后果）Too much work and too little rest often lead to illness. 过量的工作和过少的休息会引起疾病。过量的工作和过少的休息会引起疾病。All roads lead to Rome. 条条大道通罗马。条条大道通罗马。通往通往即学

24、即练即学即练 用用lead to的适当形式完成句子。的适当形式完成句子。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 toled to第32页/共63页联想联想 result in引起引起(某种结果某种结果)、使获得、使获得(某种成果某种成果)、结果、结果。如：。如：The accident resulted in two deaths.result fr

25、om由由造成、因造成、因而产生。如：而产生。如：Sickness sometimes results from eating too much.含介词含介词to的东侧短语：的东侧短语：come to 来到，苏醒来到，苏醒refer to 参考，参考， 涉及涉及look forward to 盼望盼望pay attention to 注意注意stick to 坚持坚持devote to 致力于致力于turn to get close to 靠近靠近第33页/共63页瞄准生活。瞄准生活。第34页/共63页第35页/共63页这样还可以让空气、土壤、水以及农作物不受化学物质的污染。这样还可以让空气、土

26、壤、水以及农作物不受化学物质的污染。keep free from/of使使免受免受(影响影响/伤害等伤害等)锻炼能使我们摆脱疾病。锻炼能使我们摆脱疾病。Exercise can keep us free from disease. 联合国正试图使世界免受战争的威胁。联合国正试图使世界免受战争的威胁。The United Nation is trying to keep the world free from the threat of war.第36页/共63页6. Crops such as peas or soybeans put important minerals back into

27、the soil, making it ready for crops such as wheat or corn that need rich and fertile soil. 分析分析 本句结构比较复杂。其主干结构为本句结构比较复杂。其主干结构为: 主句主句(Crops put important minerals back into the soil) + 状语状语(making it ready for crops)。状语中又包含状语中又包含“make + it + 形容词形容词”结构和由结构和由that引导的定语从句引导的定语从句(that need rich and fertil

28、e soil)。 第37页/共63页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. 分析分析本句的主干结构是一个简单句本句的主干结构是一个简单句, 其结构是其结构是: 主语主语(farmers) + 谓语谓语(prefer) + 并列宾语并

29、列宾语(planting . + leaving .)。其中其中between crops和和in the ground作地点状语。作地点状语。两个宾语后面又分别带有一个不定式作目的状语（两个宾语后面又分别带有一个不定式作目的状语（to prevent wind or water from carrying away the soil和和to become a natural fertilizer for the next years crop）。）。 第38页/共63页para1: A new discovery of scientists.para2: Several problems c

30、aused by using chemical fertilizers.para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.The structure of this passagePara1 TopicPara2 ProblemsPara3 AdvantagesPara4 Several methodsillustration（阐明）（阐明）comparison conclusionThe type of the article is_exposition（说

31、明文（说明文）第39页/共63页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 production.Long-term use of chemical fertilizers can cause damage to t

32、he land and , even more dangerous, to peoples health.Recently, however, therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.Second reading第40页/共63页 Read paragraph 2 and find out the problems caused by using chemical fertilizers. There are three problems.First, they can damage as wel

33、l as . They also stay in the and . In addition, grow too fast to . first;second; finally;last but not least ,etc.第41页/共63页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 f

34、rom chemicals.Tips: several phrases can be used.第42页/共63页 The methods to keep the soil fertile1 using natural waste from animals as fertilizer. 2 changing the kind of crop in each field .3 planting crops to use different levels of soil4 planting grass between crops to prevent The same goal : _ to gr

35、ow good food and to avoid damaging the environment or peoples health.第43页/共63页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 passagePa

36、ra1 TopicPara2 ProblemsPara3 AdvantagesPara4 Several methodsillustration（阐明）（阐明）comparison conclusionThe type of the article is_exposition（说明文（说明文）第44页/共63页第45页/共63页2. Many of these chemicals can lead to cancer or other illnesses.lead to: 导致；造成导致；造成(后果）后果）Too much work and too little rest often lead

37、 to illness. 过量的工作和过少的休息会引起疾病。过量的工作和过少的休息会引起疾病。All roads lead to Rome. 条条大道通罗马。条条大道通罗马。通往通往即学即练即学即练 用用lead to的适当形式完成句子。的适当形式完成句子。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 toled to第46页/共63页联想联想 resul

38、t in引起引起(某种结果某种结果)、使获得、使获得(某种成果某种成果)、结果、结果。如：。如：The accident resulted in two deaths.result from由由造成、因造成、因而产生。如：而产生。如：Sickness sometimes results from eating too much.含介词含介词to的东侧短语：的东侧短语：come to 来到，苏醒来到，苏醒refer to 参考，参考， 涉及涉及look forward to 盼望盼望pay attention to 注意注意stick to 坚持坚持devote to 致力于致力于turn to

39、 get close to 靠近靠近第47页/共63页瞄准生活。瞄准生活。第48页/共63页第49页/共63页这样还可以让空气、土壤、水以及农作物不受化学物质的污染。这样还可以让空气、土壤、水以及农作物不受化学物质的污染。keep free from/of使使免受免受(影响影响/伤害等伤害等)锻炼能使我们摆脱疾病。锻炼能使我们摆脱疾病。Exercise can keep us free from disease. 联合国正试图使世界免受战争的威胁。联合国正试图使世界免受战争的威胁。The United Nation is trying to keep the world free from t

40、he threat of war.第50页/共63页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. 分析分析 本句结构比较复杂。其主干结构为本句结构比较复杂。其主干结构为: 主句主句(Crops put important minerals back into the soil) + 状语状语(making it ready fo

41、r crops)。状语中又包含状语中又包含“make + it + 形容词形容词”结构和由结构和由that引导的定语从句引导的定语从句(that need rich and fertile soil)。 第51页/共63页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 ne

42、xt years crop. 分析分析本句的主干结构是一个简单句本句的主干结构是一个简单句, 其结构是其结构是: 主语主语(farmers) + 谓语谓语(prefer) + 并列宾语并列宾语(planting . + leaving .)。其中其中between crops和和in the ground作地点状语。作地点状语。两个宾语后面又分别带有一个不定式作目的状语（两个宾语后面又分别带有一个不定式作目的状语（to prevent wind or water from carrying away the soil和和to become a natural fertilizer for th

43、e next years crop）。）。 第52页/共63页请以请以“PLASTIC OR CLOTH BAGS?”为题为题模仿模仿这篇文章的篇章结这篇文章的篇章结构和句子结构去写一篇构和句子结构去写一篇说明文。说明文。第53页/共63页垫江报社征文:绿色行动进行中征写与环保相关的英文文章. 导言：古往今来，地球妈妈用甘甜的乳汁哺育了无数代子孙。原来的她被小辈们装饰得楚楚动人。可是，现在人类为了自身的利益，将她折磨得天昏地暗。人类只有一个地球；而地球正面临着严峻的环境危机。“救救地球”已成为世界各国人民最强烈的呼声。我们大家都喜欢蓝蓝的天空，清澈的湖水，新鲜的空气，渴望生活在鸟语花香里，希望

44、我们的家园更美丽。要想实现这些我们垫江人现在就应该开始行动了。以“Plastic or Cloth Bags?”为题写一篇说明文。(请模仿这篇文章的篇章结构和句子结构)第54页/共63页使用塑料袋的害处有：1.“白色污染”的主要来源；2.不可回收再利用；3.燃烧污染空气；4.埋掉(200年不会溶解)污染土壤和地下水。使用环保袋的好处有：1.可以大量减少塑料袋的使用； 2.使用寿命比纸袋长； 3.可以循环利用； 4.价格低廉，易于推广。 第55页/共63页para1: A new discovery of scientists.para2: Several problems caused by

45、using chemical fertilizers.para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.The structure of this passagePara1 TopicPara2 ProblemsPara3 AdvantagesPara4 Several methodsillustration（阐明）（阐明）comparison conclusionThe type of the article is_exposition（说明文（说明文）第5

46、6页/共63页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 passagePara1 TopicPara2 ProblemsPara3 AdvantagesPara4 Several methodsillustration（阐明）（阐明）comparison conclusionThe type of the article is_exposition（说明文（说明文）第57页/共63页Discussion and practicePlastic Or Cloth Ba