2023学年完整公开课版2015-2016学年必修4Unit2Period5UsingLanguage

金太阳好教育云平台Unit2Workingtheland

Usinglanguage231.Masterthefollowingnewwords,phrasesandsentences

inusinglanguageproduction,bacteria,pest,nutrition,discovery,soil,rootregret,reduce,regretbuildup,keep…freefrom,leadto,focuson,inadditionSomeorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil…2.Learntheadvantagesoforganicfarming.

本课首先观看嘉世有机农业视频，引出本节题目“化学耕作还是农业耕作”。进而讨论化学耕作和有机耕作的概念。化学耕作的弊端是什么？为什么农民转而开始有机耕作？有机耕作通过什么方法来保持土地的肥沃？然后让学生听课文录音，了解短文的主旨以及各段的大意。最后讲解短文的语言点。最后通过改写的短文加深对本文的了解。

讲解农业耕作是配有相关的视频，有助于学生理解。总结概括文章和段落大意，提高学生的理解和表达能力。听课文录音有助于学生听力水平的提高。ReadingCHEMICALORORGANICFARMING?Whatcanweharvest?Nopains,nogains.嘉世有机农业Addfertilizerintothesoil

Howcanfarmersmaketheplantsgrowwell?Howmanykindsoffertilizersdofarmersuse?naturalfertilizerorganicfarmingchemicalfertilizerchemicalfarmingTwokinds.Discussion:Whichkindoffarmingisbetter?BetterLet’slearnmoreaboutchemicalandorganicfarming!Listentothetapecarefully.usinglanguagereadingorganicfarmingisbecomingmorepopular.Themainideaofthetext:FastReadingLong-termuseofchemicalfertilizerscancausedamagetothelandandpeople’shealth.Problemscausedbychemicalfertilizers.Themain

ideaofeachparagraphP1.P2.Farmersandcustomersturntoorganicfarming.Othermethodstokeepthesoilfertile.

P3.P4.CarefulReadingWhyarechemicalfertilizerssopopularinfarmingtoday?Becausetheyarecheap.Theyareagoodwaytostopcropdiseaseandincreaseproduction.Theycancausedamagetotheland.Theydogoodtopeople’shealth.ParagraphIChemical

farming

advantages

problems

cause

stopcropdisease

increase

productiondamagethelandby

killingthehelpfulbacteriaandpestsaswellastheharmfulones.affect

cropsby

stayinginthegroundandundergroundwaterforalongtimeleadtocancer/illnessesby

building

upinpeople’sbodiesovertimehave

lessnutritionbygrowingtoofastParagraph2Organicfarming

NaturalwastefromanimalsMakethesoilricherinmineralsandmorefertileAhealthysoilReducediseasesincropsHelpcropsgrowstrongandhealthyParagraph3Organic

farming

methods

advantagesusenaturalwastemake

the

soil

rich

inmineralschange

the

cropputmineralsbackintosoil,making…plantcropswithdifferentrootsusedifferentlevelsoflandplant

grassbetweencropsprevent…from…,anaturalfertilizerParagraph41.WhichstatementisWRONGaccordingtothetext?

A.Allcropsareorganic.B.Recently,theterm“organicfarming”hasgainedanothermeaning.C.Allfarmersusefertilizers.D.Scientistsbelievesomechemicalfertilizersarebetterforpeople.Readagainandchoosethebestanswer.

D2.Whichisnotthereasonwhyorganicfarmersprefernaturalwastefromanimals?

A.Itcankeepthefoodfreefromchemicals.B.Itcankeeptheair,soilandwaterfreefromchemicals.C.Itcankillharmfulpests.D.Itcanmakethesoilricherinmineral.C3.Whatistheadvantageofusingchemicalfertilizers?

A.Leavingchemicalsinthegroundforalongtimeisgoodforwatersupply.B.Theycangetthesoilexhausted.C.Theycankillhelpfulbacteria.D.Theycankillharmfulpest.D

4.Theorganicfarmersdothefollowingsexcept______.A.addingfertilizerswhichisrichinmineralB.changingcropseverytwoorthreeyearsC.plantingseedsindifferentlayersofthesoilD.plantinggrassbetweencropstopreventthesoilfrombeingblownawayA

1.Whatis“organicfarming”?Answer

thequestions.Itreferstocropsgrowingwithnaturalratherthanchemicalfertilizers.2.Whatdoorganicfarmersprefertouseasfertilizer?

Naturalwastefromanimals.Becausepeasandbeanscanputmineralsbackintothesoil,makingitrichandhealthyandreadytogrowmorewheatorcorn.3.Whydoorganicfarmersgrowpeas

orsoybeansaftercornorwheat?4.Whatisthemaingoalforusingorganicfarmingmethods?TogrowgoodfoodandtoavoiddamagingTheenvironmentorpeople’shealth.•Nouseofchemicalfertilizers•Awayfromindustrialareas•Awayfromdirtywatersupply•NoairpollutionAsummaryoforganicfarming:FillintheblanksManyfarmerswelcome______fertilizersbecausetheyaregreatwaytostopcropdiseaseandincrease_________.Butthesechemicalcan____toillnesses.Sofarmersbegantoturnto______farming.They____onkeepingtheirsoilrichand_____ofdisease.Organicfarmersoftenpreferusing______wasteofanimalsasfertilizer.Thiskeepsthesoilfree____chemicals.Therearemanymethodstokeepthesoil_____.Themethodshavethesamegoal:togrowgoodfoodandavoiddamagingthe_________orpeople’shealth.chemicalproductionfocusfreenaturalfromfertileenvironmentleadorganic1.Thesechemicalsinthefoodsupply

buildupinpeople’sbodiesovertime.LanguagePointsHardworkingconditionsbuildupcharacter.build

up

增强;建立;开发

艰苦的工作条件能磨练人的性格。2.Manyofthesechemicalscanlead

to

cancerorotherillnesses.Allroadslead

toRome.

leadto导致；造成条条大道通罗马。3.Theyfocus

onkeepingtheirsoilrichandfreeofdisease.focus

on:集中(注意力,精力等)于Youshouldfocusyourattentiononyourwork.把注意力集中在你的工作上。

4.Thisalso

keeps

theair,soil,waterandcropsfree

fromchemicals.4.Youmusttakecaretokeepthewoundfreefromthedirt.

keeps…freefrom/of:

使…免受(影响,伤害等);使不含(有害物)你必须照顾好伤口，免受灰尘的伤害。5.

reduce

v.

减少,降低e.g.公司尽力通过减少花销来提高利润。Thecompanytriestoincreaseprofitsby_______________.今年我们已经减少了业务开支。We______________expensesthisyear.reducing

costshave

reducedExpressions

1.化肥2.对…造成损害3.洗掉某物4.导致;造成(后果);通往5.逐渐增强,建立6.另外(还有)7.使…免受(影响);8.集中(注意力、精力)于9.每隔几年10.避免做…chemicalfertilizerscause/dodamagetowashoffleadtobuildupinaddition(to)keep…freefrom/offocusoneveryfewyearsavoiddoingExercises

washoff,l