高中英語(yǔ)必修四-unit2-using-language-chemical-or-organic-farming課件

Unit2WorkingthelandUsinglanguageItisfertilizer.

Whatisthesubstanceweputonthesoiltomakecropsgrow?matter（物質(zhì)）Howmanykindsoffertilizersdofarmersuse?chemicalfertilizerNaturalfertilizerChemicalfertilizer

cowdung用化學(xué)肥料和有機(jī)肥料的區(qū)別:NaturalfertilizerReadingCHEMICALORORGANICFARMING?化學(xué)耕作還是有機(jī)耕作？Step1FastreadingMatchthemainideaofeachparagraph.para1:para2:para3:para4:Problemscausedbyusingchemicalfertilizers.Othermethodstokeepthesoilfertile.Farmersandcustomersturntoorganicfarming.Long-termuseofchemicalfertilizerscancausedamagetothelandandpeople’shealth.Step2CarefulreadingPara11.Whyarechemicalfertilizerssopopularinfarmingtoday?2.Afterthelong-termuseofchemicalfertilizers,whathavescientistsfound?Step2CarefulreadingPara11.Whyarechemicalfertilizerssopopularinfarmingtoday?Becausetheyareagreatwaytostopcropdisease

and

increaseproduction.advantagesPara12.Afterthelong-termuseofchemicalfertilizers,whathavescientistsfound?Long-termuseofchemicalfertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth.Para2Chemical

farmingstopcropdisease

increase

production_______theland_____crops,animalsandhumansleadto

cancer/illnesseshave

lessnutritiondamageaffect1.Somefarmersandmanycustomersarebeginningtoturntochemicalfarming2.Organicfarmingissimplyfarmingwithoutusinganychemicals.

3.orgnicfarmerspreferusingbothnaturalwastefromanimalsandchemicalfertilizerTrueorfalsePara3FOrganicfarmingTF3.OrgnicfarmerspreferusingnaturalwastefromanimalsItistogrowgoodfoodandavoiddamagingtheenvironmentorpeople’shealth.Whatisthemainreasonforusingorganicfarmingmethods?Para4Organic

farmingusenaturalwastemake

the

soil

rich

inminerals______

thecropineachfieldeveryfewyearsputmineralsbackintosoil,making…plantcropswithdifferentlengthsofrootsusedifferentlevelsofsoilplant

grassbetweencropsandleaveitinthegroundprevent…from…,anaturalfertilizerPara4Change_______fertilizerscancausemanyproblems,so_____farmingisbecomingmorepopular.Organicfarmingmeansgrowingcropswith____fertilizer.Theorganicfarmersfocus

On

keepingthesoil_____and______.STEP3Themainideaofthetext:Chemicalorganicnaturalrichhealthy.para1:longtermuseoffertilizercausedamagepara2:problemscausedbyusingchemicalfertilizers.para3:farmersandcustomersturntoorganicfarming.Para4othermethodstoKeepthesoilfertile

STEP4ThestructureofthispassagePara1TopicPara2ProblemsPara3AdvantagesPara4Methodsillustration（闡明）comparisonconclusion請(qǐng)以“PLASTICORCLOTHBAGS?”為題模仿這篇文章的篇章結(jié)構(gòu)和句子結(jié)構(gòu)去寫一篇說(shuō)明文。DiscussionandpracticePlasticOrClothBags?illustration（闡明）comparisonconclusionPara1:Para2:Para3:Para4:

簡(jiǎn)單闡明問(wèn)題現(xiàn)狀

使用塑料袋引起的問(wèn)題如：1.到處都是塑料袋，造成白色污染，2.塑料的分解要用上百年的時(shí)間3.塑料袋加熱后會(huì)產(chǎn)生有害物質(zhì)，導(dǎo)致癌癥.使用布袋的好處如:1.布袋可以重復(fù)使用,節(jié)省能源.2.自己可以制作布袋很有趣…結(jié)論Overthepasthalfcentury,…h(huán)avebecomeverycommon….…welcomedthemasa…wayto….Recently,however,wehavebeenfindingthattheycancausedamageto…,even…,topeople’shealth.Whataresomeoftheproblemscausedby…?First,…Withthesediscoveries,…arebeginningtoturnto….….Thefollowingwordsmayhelpyou.STEP5Homework:1.Readthetextandunderlinethedifficultsentences.2.Finishthewriting.

Overthepasthalfcentury,plasticbagshavebecomeverycommoninourdailylife.Wewelcomedthemasaconvenientwayto

carrygoods.Recently,however,wehavebeenfindingthattheycancausedamagetothe

environment,evenworse,topeople’shealth.

Whataresomeoftheproblemscausedbyplasticbags?First,

peopleoftenleaveplasticbagshereandthere,makingwhitepollution.Second,ittakesalongtime,morethan100years,tobeexact,tobreakup.Lastbutnotleast,whenheated,plasticbagscanproducesomethingharmful,whichcanbuildupinourbodyandeventuallyleadtocancerorotherillnesses.

Withthesediscoveries,wearebeginningtoturntoclothbags.

Theycanbeusedmanytimes.Peoplecansavealotofsourceinthisway.Itisalsoagoodideatomakesomebyourselves,whichisinteresting.Let’suseclothbagsinourdailylifeinsteadofplasticbags,notonlyfortheenvironmentprotection,butalsothesakeofourhealth.Whatdoyouthinkofthefarmingtoday?

healthy?environment-friendly?natural?chemical?organic?green?transgenic?如何學(xué)好高中英語(yǔ)？1.要發(fā)自內(nèi)心的愛(ài)上它古語(yǔ)說(shuō)得好“知之者不如好之者，好之者不如樂(lè)之者”。說(shuō)的就是興趣。只要我們對(duì)英語(yǔ)有濃厚的興趣，就等于成功了一半。如何讓自己愛(ài)上學(xué)英語(yǔ)呢？這里大家記住兩點(diǎn)：首先，我們可以把要求稍微降低一點(diǎn)，放慢一點(diǎn)學(xué)習(xí)進(jìn)度，知識(shí)的鞏固頻繁一點(diǎn)，這樣我們獲得的知識(shí)就會(huì)多一點(diǎn)，興趣也會(huì)更濃一點(diǎn)。其次，作為學(xué)生，我們要明白一點(diǎn)，每一個(gè)學(xué)習(xí)成功的學(xué)生都很努力，想走捷徑，是不可能學(xué)好英語(yǔ)的。要積累，不要急于成功。否則就可能會(huì)造成消化不良，或者給自己很大壓力，進(jìn)而對(duì)自己失去信心，失去學(xué)英語(yǔ)的興趣。這樣一來(lái)適得其反。2.單詞是學(xué)好英語(yǔ)的基礎(chǔ)詞匯的積累是提高英語(yǔ)成績(jī)的基礎(chǔ)，提到背單詞很多同學(xué)都很反感。經(jīng)常會(huì)聽(tīng)到同學(xué)說(shuō)“我每天都背單詞，可是我當(dāng)時(shí)記住了，過(guò)不了多久就忘了，我忘了一遍又一遍，也記了一遍又一遍，反反復(fù)復(fù)，但是考試時(shí)效果還是不好，這個(gè)問(wèn)題有解嗎？”同學(xué)們不妨嘗試這樣做：把高一到高的三所有的單詞打印下來(lái)，每天記50個(gè)單詞，可以先遮蓋英語(yǔ)，我們根據(jù)漢語(yǔ)讀出英語(yǔ)；然后再遮蓋中文，我們根據(jù)英語(yǔ)明確漢語(yǔ)意思，再把不知道單詞就記錄在自己的單詞本上；第二天在我們開(kāi)始記下一組的50個(gè)單詞之前，先把把前一天沒(méi)有掌握的單詞繼續(xù)看，因?yàn)橛行﹩卧~在閱讀中會(huì)看到，這些詞只要知道意思就可以，但有些需要在寫作中使用，必須熟記。3.學(xué)習(xí)英語(yǔ)的好方法是背課文背課文對(duì)培養(yǎng)語(yǔ)感、增加詞匯量、了解語(yǔ)法結(jié)構(gòu)都是非常有作用的。我們除了背誦教材里的文章，還可以背新概念的文章。大家一定要理解，英語(yǔ)老師讓我們背課文是非常有道理的，同學(xué)們一定要用心去背，收獲都是我們自己的。