高中英语(m4)教学资料-u2oganicfarming胡.ppt

金榜金榜27-28检测检测 Part 4.I.1.build up 2.lead to 3.long-term use of 4.focus on 5.every few years 6.turn to 7.keepfree from 8.cause damage to 9.be washed off 10.avoid damaging the environment or peoples healthII.ABCCB CDAAB ACIII.完型：1-5.BDBCA 6-10.DABCB 11-15 AABCA CHEMICAL OR ORGANIC FARMING?Unit 2 Using Language(P.14)How much do you know about Yuan Longping?Look at the title and picture and predict the content.What do we put on the soil to makes crops grow better?It is fertilizer.How many kinds of fertilizers do farmers use?There are two kinds.They are chemical fertilizers and natural ones.Which kind of fertilizer do farmers use when they are doing organic farming?Whats organic farming?ORGANIC FARMINGis simply farming without using any chemicals.Scanning underline the answers to the 4 questions.(P.14)1.Why are chemical fertilizers so popular in farming?2.What problems can be caused by using chemical fertilizers?3.What is organic farming?4.What is the main reason for using organic farming methods?1.Why are chemical fertilizers so popular in farming today?Because farmers welcomed them as _ to stop crop disease and increase production.a great wayLong-term use of these chemical fertilizers can _and _ to peoples health.cause damage to the landmore dangerous Paragraph 1Paragraph 22.What are the problems caused by chemical fertilizers?First,they _.Second,chemicals also stay _.These chemicals can _.Third,fruit,vegetables and other food grown with chemical fertilizers usually _.They look _.for a long timelead to cancer or grow too fast to be full of much nutritionbeautifuldamage the land3.What is organic farming?Organic farming means _.Paragraphs 3-4growing cropswithout using any chemicals.Read Para.3-4 again,find and write down the methods and advantages.Methods oforganic farmingAdvantages of methods1.use natural wastemake the soil richerMethods ofAdvantages of4.plant grass between crops and leave it.4.This prevents wind or water from carrying away soil2.change the kind of crop3.plant crops with different levels2.renew the minerals3.use different levels of soil.4.What is the main reason for using organic farming methods?The main reason for using organic farming methods is to _and to _or_.grow good foodavoid damaging the environmentpeoples healthUnderline useful phrases 1.over the past half century 2.increase production3.damage the land 4.build up5.lead to 6.without using any chemicals7.focus on8.reduce disease 9.grow strong and healthy10.use as 11.rich in 12.keep.free from13.every few years 14.carry awayhomework校本校本4限时训练限时训练Listening This is the VOA Special EnglishWhat is it about?Listening Listening This is the VOA Special English This is the VOA Special English Agriculture Report.Agriculture Report.Agricultural scientists in Switzerland have Agricultural scientists in Switzerland have demonstrateddemonstrated论证论证论证论证 the _ effects of organic the _ effects of organic farming methods.Organic farms use no farming methods.Organic farms use no man-made _ to increase crops or man-made _ to increase crops or control insects and disease.The study showed control insects and disease.The study showed that _ fields produced fewer crops,on that _ fields produced fewer crops,on average,than other fields.However,the scientistsaverage,than other fields.However,the scientists say the organic _ improved the_ say the organic _ improved the_of the soil and used half as much energy.of the soil and used half as much energy.Listening This is the VOA Special English Agriculture Report.Agricultural scientists in Switzerland have demonstrated论证论证论证论证 the _ effects of organic farming methods.Organic farms use no man-made _ to increase crops or control insects and disease.The study showed that _ fields produced fewer crops,on average,than other fields.However,the scientists say the organic _ improved the_of the soil and used half as much energy.long-termchemicalsorganicmethodshealth1.What other What other ways ways can be used to can be used to increase increase productionproduction?2.What other 2.What other methodsmethods can be used for can be used for organic organic farmingfarming?Discussion in groups of 4.One writes down,and then reports.a.Water the plants witha.Water the plants with clean clean water.water.b.Leave the b.Leave the earth earth in its natural state after the in its natural state after the harvest.harvest.c.Grow crops without c.Grow crops without pesticidespesticides d.Grow d.Grow away fromaway from industrial areas.industrial areas.e.Keep animals e.Keep animals free offree of drugs.drugs.A.Animal waste b.Use A.Animal waste b.Use pesticide pesticide pestisaid n.pestisaid n.农药农药农药农药c.Irrigate in time d.Plant c.Irrigate in time d.Plant at the right timeat the right time e.Choose the best seeds e.Choose the best seeds f.f.GM foods(genetically-modified)Write a summarychemical fertilizers popular becausescientists have discovered some problemsNow organic farming use many kinds of methods All these methods try to Homework Write the summary and hand them in.Organic Farming How many kinds of fertilizers do farmers use?There are two kinds.They are chemical fertilizers and natural ones.Main idea of the passageChemical fertilizers can cause many problems,so organic farming is becoming more popular.ORGANIC FARMINGStructure of the textI using chemical fertilizers for a long time can hurt the land and also peoples healthII Problem caused by chemical fertilizers1.Damage the land by killing the helpful bacteria and pests as well as the harmful ones2.Lead to cancer or other illness.3.Food grown with chemical fertilizers look beautiful,but inside there is usually more water than vitamins and minerals.Organic farming is becoming more popular with some farmers and many customers after these discoveries came out.IV Other methods to keep the soil fertile.