（2019版）新人教版选择性必修第一册Unit 5Working the Land Using Language ppt课件.ppt

1、English LearningUnit 5 Working the Land：Using Language English LearningIn this class we will: u To know the meanings of chemical farming and organic farming.u To know the advantages and disadvantages of both chemical farming and organic farming.u To master some transitional words or phrases in the t

2、ext.u To express opinions on chemical farming and organic farming, and write an argumentative essay .English LearningWhat are the farmers doing?They are fertilising the crops. What kinds of fertilisers do they use?organic fertiliser chemical fertiliser Now, lets read a text to find the answer.What k

3、ind of farming are they doing?Organic farming Chemical farmingEnglish LearningWhats the main idea of the text? The text mainly talks about chemical farming and organic farming. _ can cause many problems, as an alternative, some people switch to _.Chemical farmingorganic farmingEnglish LearningOrgani

4、c farming is simply farming without using any chemicals.1. What is chemical farming? 2. What is organic farming? Skim the text, and then answer the following questions.Chemical farming is farming using chemical pesticides and artificial fertilisers.English LearningRead the text, and then answer the

5、following questions.1. Why did many farmers welcome the introduction of chemical farming?2. What concerns many people about the use of pesticides?3. What is one problem with the use of chemical fertilisers?4. How is organic farming different from chemical farming?5. Why do organic farmers change the

6、 kind of crop grown in a field every year?6. What is the goal of using organic farming methods? Do you think it can be reached? Why or why not?P55 1English Learning1. Why did many farmers welcome the introduction of chemical farming?Many farmers welcomed them as a great way to fight crop diseases an

7、d increase production. 2. What concerns many people about the use of pesticides?Their long-term use can sometimes harm both the land and peoples health.3. What is one problem with the use of chemical fertilisers?Crops grown with them usually grow too fast to be rich in nutrition.4. How is organic fa

8、rming different from chemical farming?Organic farming is simply farming without using any chemicals. Organic farmers focus on keeping their soil rich and free of diseases through natural means.English Learning5. Why do organic farmers change the kind of crop grown in a field every year?Different cro

9、ps are grown because they put important minerals back into the ground, making it ready for the next batch of crops.6. What is the goal of using organic farming methods? Do you think it can be reached? Why or why not?The goal of using organic farming methods is to grow good food while avoiding damage

10、 to the environment or to peoples health. Yes, I think this goal can be reached. Farmers worked for centuries without using any kinds of chemicals and without harming the environment, and the food they produced was just fine.English LearningMatch the main ideas (A-D) below with the paragraphs. Then

11、complete the sentences in the table.P56 2A. What organic farming isB. Why man-made chemicals are still used in farming C. Organic methods for producing rich soilD. The problems with chemical farmingPara.Main ideaDetail1-2 Pesticides can kill helpful _. Some pesticides have been _ because of the _. C

12、rops grown with chemical fertilisers usually _ to be full of _.3 Many organic farmers use _ as fertiliser.4 They often _ grown in each field _. They also plant crops that use _ of the soil to help keep it rich.5 Organic farming is nowhere near able to meet the high _.bacteria and insectsprohibitedda

13、mage they cause grow too fastnutrition natural waste from animalschange the kind of cropevery yeardifferent depthsdemand for food around the worldDACBEnglish Learningchemical chemical farming farming ThinkingThinkingorganicfarming advantagesdisadvantages fight crop disease increase production lower

14、cost crops look beautiful outside. good food avoiding damage to the environment or to peoples health. harm the land harm peoples health harm the environment crops are less in nutrition. cannot meet the demand for food more efforts and higher cost smelly gases.English LearningPara1:howeverPara2: for

15、example, in addition, in turn, in fact, as for, but, and, as wellRead for transitional words & phrasesRead for transitional words & phrasesPara3:as an alternative, for example, alsoPara4:also, for instance, for example, butPara5:thereforeargumentative writingargumentative writingEnglish Learning me

16、up with me up with three main points three main points to support your opinion, to support your opinion, and then add and then add at least one detail at least one detail to support each main to support each main point. point. WritingWritingTopic sentence:Topic sentence: In my opinion, _farming is p

17、referableIn my opinion, _farming is preferableto _ farming because_.to _ farming because_.Point 1: Point 1: _ _ Detail:Detail:_Point 2: Point 2: _ _ Detail:Detail:_Point 3:Point 3: _ _ Detail:Detail:_Conclusion: Conclusion: _ chemical farming VS organic farmingchemical farming VS organic farmingEngl

18、ish Learningexpress your opinions:express your opinions:In my eyes Im opposed to Id prefer because From my point of view,What I firmly believe in is thatmake a conclusion:make a conclusion:In summary,In a word,All in all,To sum up,English LearningWrite an argumentative essay giving your opinion on c

19、hemical or organic farming.English Learning1. Is the author of the passage for or against organic farming? How do you know?2. What other disadvantages of chemical farming did the author not list?3. How might the following items be problems and how important are they for organic farming? natural anim

20、al waste used as fertiliser higher cost of producing food greater effort required to farm4. What other disadvantages of organic farming can you think of?P57 3English LearningTopic sentence: In my opinion, _ farming is preferable to _ farming because _.Point 1: _ (Detail)_Point 2: _ (Detail)_Point 3:

21、 _ (Detail)_Conclusion: _P57 3English Learning In my opinion, organic farming is preferable to chemical farming because of the benefits to the environment and to people, and because organic food is more nutritious. To begin with, chemical farming harms the environment. Since chemical pesticides are

22、not found in nature, normal natural processes cannot get rid of them. Instead, the chemicals tend to accumulate in the soil and water, and are absorbed in the food chain, where they poison wildlife and domestic animals. This affects us directly, because we end up eating plants, dairy products, eggs,

23、 and meat that have high levels of pesticides. Think about it: The purpose of the pesticides is to kill “pests”, that is, to kill insects. Something that can kill an insect probably is not healthy for a person to eat. While it may be true that the food we eat does not have enough pesticide in it to

24、kill us immediately, over the years this pesticide may cause us health problems or give us diseases such as cancer.P57 3English Learning Finally, organic food is generally more nutritious than food grown with man-made chemicals. If you remember a few years ago, there was the case of watermelons lite

25、rally exploding in the fields because they had been given chemicals to make them grow faster. The reason why they exploded was that they contained too much water, because the farmers had used too many chemicals and the weather was unusually wet. As it turns out, such chemicals are commonly used in f

26、arming to grow larger crops more quickly. Do you really want to eat watered-down fruit and vegetables which have been rushed to market? They cannot possibly taste as good as organic vegetables, nor can they be as nutritious. In closing, I would like to suggest buying organic food. Yes, the price is

27、a little higher, but the small price we pay extra will bring us huge rewards in the end.English LearningEnglish LearningP57 4 Does the writer do a good job of expressing his/her opinion? Does each paragraph have one main idea? Does each paragraph have at least one detail to support its main idea? Does the writer sequence the points in a logical order? Does the writer do a good job persuading you to accept his/her opinion? 1. Use this checklist to help you review your partners draft.2. Take your draft back and revise it.P57 5English LearningSee You Next Class!