高中英语选择性必修一 Unit5 Working the land period5

1、Chemical versus organic farmingPeriod 5Unit 5 Working the Land选择性必修一 人教版（2019）He is spraying pesticide What are they doing？He is using organic fertilizer Lead-inLead-inHe is fertilizing the soil What is chemical farming?Lead-inLead-inChemical farming is farming using chemical pesticides and artifici

2、al fertilizersWhat is organic farming?Lead-inLead-inOrganic farming is not pesticide, fertilizer, and other synthetic growth agents of production, but use manure for fertilizer and other organic fertilizers.Reading 3. widespread adj. Chemical pesticides and artificial fertilisers have been in widesp

3、read use in farming since the middle of the 20th century. When they were first introduced, many farmers welcomed them as a great way to fight crop disease and increase production. Over time, however, what some scientists have found is that their long-term use can sometimes harm both the land and peo

4、ples health. para.1chemical pesticides 2. artificial fertilisersQuestion Time Read the text and answer the following questions. 1. Why did many farmers welcome the introduction of chemical farming? Many farmers welcomed them as a great way to fight crop diseases and increase production. Paragraph1 细

5、节理解Question Time Read the text and answer the following questions. 2. What concerns many people about the use of pesticides? Their long-term use can sometimes harm both the land and peoples health. Paragraph1 细节理解Reading6. in turn For example, pesticides can damage the land by killing not only harmf

6、ul bacteria and insects, but also helpful ones. In addition, these chemicals can stay in the soil and underground water sources for a long time. This affects the crops grown on the land and, in turn, the animals and humans who digest them. Many people worry that these chemicals may make them ill and

7、 even cause cancer. para.24. bacteria 5. digestReadingIn fact, some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment. As for chemical fertilisers, crops grown with them usually grow too fast to be rich in nutrition. They may lo

8、ok beautiful on the outside, but inside there is usually more water than essential minerals, and they often have less flavour as well.8. nutrition n. 9. essential adj.para.2prohibit v.mineral n. ReadingAs an alternative, some farmers have switched to organic farming, and many customers have turned t

9、o organic food when they shop at the local grocery. Organic farming is simply farming without using any chemicals. Organic farmers on keeping their soil rich and free of disease through natural means. For example, many organic farmers use natural waste from animals as fertiliser. This makes the soil

10、 in their fields richer in minerals. It also keeps the air, soil, water, and crops free of chemicals.para.3vocabularyalternative n/adj. 12. grocery 13. free of Question Time Read the text and answer the following questions. 3. What is one problem with the use of chemical fertilizers? Crops grown wit

11、h them usually grow too fast to be rich in nutrition. Paragraph2 细节理解4. How is organic farming different from chemical farming? Paragraph3 细节理解Organic farming is simply farming without using any chemicals. Organic farmers focus on keeping their soil rich and free of disease through natural means. Re

12、adingOrganic farmers also use many other methods to produce rich soil. They often change the kind of crop grown in each field every year. For instance, they may grow corn or wheat in a field one year, and then grow beans there the next. Why different crops are grown is because they put important min

13、erals back into the ground, making it ready for the next batch of crops. para. 4vocabulary14. instance n. for instance 15. , making it ready for the next batch of crops.V-ing 做结果状语（自然而然的结果）Reading Organic farmers also plant diverse crops that use different depths of soil to help keep it rich. For ex

14、ample peanuts grow on the grounds surface, but many other vegetables put down deep roots. The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to peoples health.16. depth n. 17. root n. put down deep rootspara. 4Question Time Read the t

15、ext and answer the following questions. 5. Why do organic farmers change the kind of crop grown in a field every year? Different crops are grown because they put important minerals back into the ground, making it ready for the next batch of crops. Paragraph4 推理判断Question Time Read the text and answe

16、r the following questions. 6. What is the goal of using organic farming methods? Do you think it can be reached? Why or why not? 1）The goal of using organic farming methods is to grow good food while avoiding damage to the environment or to peoples health.2） Yes, I think this goal can be reached. Pe

17、oples awareness of eating organic foods is increasing. And farmers worked for centuries without using any kinds of chemicals and without harming the environment, and the food they produced was just fine. Paragraph4 细节理解+观点态度Reading Some people would prefer to stop the use of man-made chemicals in ag

18、riculture entirely. What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world. Organic farming is nowhere near able to meet that need. Therefore, there is still a long way to find a suitable solution that puts sufficient food on the dinner table

19、 while keeping people and the environment as healthy as possible.vocabulary18. entirely adv. 19. What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world.what引导主语从句，在从句中做主语；that引导同位语从句，是the fact的同位语。para. 5Question Time Read the text and answer

20、 the following questions. 7. Why could some people not choose but use man-made chemicals in agriculture？ Because chemical farming still serves the high demand for food around the world and organic farming is nowhere near able to meet the need.Paragraph5 细节理解Reading Read the passage carefully and com

21、plete the sentences in the table.KindDetailChemical farmingAdvantages: a great way toDisadvantages : killaffectOrganic farmingAdvantages: The soil is rich in Keep free of chemicals Avoid damage to Disadvantages :The writers viewfight crops disease andincrease production.helpful bacteria and insectsc

22、rops, animals and people mineralsthe air , soil , water , and crops the environment or to peoples healthnowhere near able to meet the need.There is still a long way to find a suitable solution Group showMatch the main ideas (A-D) below with the paragraphs. Paragraph Main idea 1-2 3 4 5A What organic

23、 farming is B Why man-made chemicals are still used in farmingC Organic methods for producing rich soil D The problems with chemical farmingDACBGroup show Complete the sentences in the table.ParagraphDetail1-2Pesticides can kill helpful .Some pesticides have been because of the .Crops grown with che

24、mical fertilisers usually to be full of .3Many organic farmers use as fertiliser.bacteria and insects prohibiteddamage they causenatural waste from animalsgrow too fastnutritionGroup showComplete the sentences in the table.ParagraphDetail4They often grown in each field .They also plant crops that us

25、e of the soil to help keep it rich.5Organic farming is nowhere near able to meet the high .change the kind of cropevery yeardifferent depthsdemand for food around the worldStudyadj.完全必要的;极其重要的Water is essential to life, so we should save water.对很重要be essential to/for It is essential that.(should) do

26、. 做是完全必要的It is essential for sb to do. 对某人来说做是完全必要的Study1）对于这份工作，耐心是非常重要的。Patience is essential for this job.It is essential that effective measures be taken to protect our environment.2）有必要采取有效的措施来保障我们的环境。When we learn a language , it is essential for us to learn vocabulary.3）当我们学某种语言时，我们有必要学词汇。Stu

27、dyn可供选择的事物 adj.可供替代的；非传统的He has the alternative of going to college or working.的替代品an alternative tohave no alternative but to do sth别无选择只好做某事have the alternative of doing sth有做某事的选择Study1）由于疫情封锁（ coronavirus lockdown ），他除了居家别无选择。Due to the coronavirus lockdown, he has no alternative but to stay at

28、home.We have the alternative plans of having a picnic or climbing a hill.2）我们在去野餐或者去爬山两个计划中只能选一样。As an alternative, some farmers have switched to organic farming.3）作为一种选择,一些农民已经转向有机农业。Study为什么要种植不同的作物,是因为他们把重要的矿物质放回地里,让它再次为下一批作物做准备。Why different crops are grown is because they put important minerals

29、 back into the ground , making it ready again for the next batch of crops.动词-ing形式短语做结果状语表示自然而然的结果，常用逗号与主句隔开,有时在其前加副词thus;动词不定式做结果状语往往表示出乎意料的结果或不好的结果,其前常加only。动词-ing形式短语做结果状语。Study1）他跑到火车站,却发现火车已开走了。He ran to the station , only to find the train had left. The car was caught in a traffic jam , thus c

30、ausing the delay.2）这辆车遇到了交通堵塞,结果晚点了。The hospital has recently obtained new medical equipment, allowing more patients to be treated.3）近期这个医院购进了新的医疗设备，允许更多的病人被治疗。Group workDiscuss the advantages and disadvantages of chemical farming and organic farming. And tell which one you prefer and why.Tips: Chem

31、ical farmingAdvantages: fight crop diseases, increase production (serve the high demand for food around the world)Disadvantages: 1)pesticide can harm land and peoples health, kill helpful bacteria and insects and stay for a long time and affect crops, animals and people 2)chemical fertilizer are not

32、 rich in nutrition and have less flavorGroup workDiscuss the advantages and disadvantages of chemical farming and organic farming. And tell which one you prefer and why.Tips: Organic farmingAdvantages: keep soil rich and free from disease through natural meansDetails: natural waste from animals as f

33、ertilizerchange the kind of crop in each field every yearplant diverse crops using different depths of soilDisadvantages: unable to serve the high demand for food aroundthe worldGroup workWrite an short passage to show whether you support chemical farming or organic farming. (Following the format of

34、 an argumentative essay. Topic sentence: In my opinion, farming is preferable to farming because .Point 1: . (Detail) .Point 2: . (Detail) . Point 3: . (Detail) .Conclusion: .Group workDiscuss the difference between traditional agriculture and modern agriculture. And tell which one you prefer and wh

35、y. TopicThe difference between traditional agriculture and modern agricultureTenseThe simple present tenseOutlineP1 Your opinionP2 Compare the differenceP3 ConclusionGroup workDiscuss the difference between traditional agriculture and modern agriculture. And tell which one you prefer and why. Key wo

36、rdsoutput working efficiency fertilisers pesticides environmentKey sentencesIn my opinion, is preferable to .most farmers grow crops with the help of modern machines instead of planting crops with their hands. In a word .HighlightsWhats more, the output and working efficiency are also improved greatly, which contributes a lot to social-economic development. Group showExchange your draft with a partner. Use the checklist to help you review your partners draft. Share your essay with the rest of the class.GroupsAchievementsGroup1Group2Group3Group4Grou