Unit2TheEnvironment-WelcometotheUnitTeachingaims:(1)Makestudentspayattentiontotheenvironmentaroundthemanddotheirbesttoprotecttheenvironment.(2)GettheSstoimproveoralEnglishbytalking.Importantpoints&difficultpoints:(1)Studentsareexpectedtoexpresstheirownopinionsonprotectingtheenvironment.(2)Encouragestudentstospeakfreely.Teachingmethods(1)Discussion(2)AskandanswerTeachingaids1)Ataperecorder2)AcomputerProcedure:Step1Lead-inToday,we’lllearnsomethingabouttheenvironment.First,let’senjoyasongcalledEarthsongbyMichaelJackson.Doyoulikethemusic?Doyouthinktheenvironmentintheearthisimportantforus?Whatisyourpictureofearthinyourmind?(Thenshowthestudentsapicture)Lookatthepictureandanswermyquestion.Whyistheearthcrying?(Theearthisfacingseriousproblems)Whataretheproblems?用心爱心专心Step2DiscussionThenaskstudentstolookatthepicturesinthebook.Nowlet’sdiscussthepicturesthenanswersomequestions.Lookatthepictureaboveanddiscusswhichonesarecausedbynatureandwhichonesarecausedbyman?ThenshowsomepicturesofthecityofPompei.Askthestudentssomequestions.Whatcityisinthepicture?WhatcausedthedestroyofthecityofPompeii?(MountVesuviuseruptedandlava,ashandrockspouredoutofitontothesurroundingcountryside.AllthepeopleinPompeiiwereburiedalive,andsowasthecity.)Canyouthinkofothernaturaldisastersthatdamagetheenvironment?Step3TalkaboutnaturaldisasterOk.Pleaselookatthescreen.Thepictureisaboutsomekindsofnaturaldisasters.Thenlet’stalkaboutthesedisastersonebyone.earthquakefireTyphoonhurricaneFlooddroughtNaturaldisastersSnowslideAnymore??WarmingupWarmingupReference(SomethingaboutTangShanearthquake:OnJuly28th,1976,at3:42a.m.localtime,apowerfulearthquakerecordingM8.2tookplaceinnortheasternChinaabout95mileseastofBeijingnearTangShan,anindustrialcityofabout1millionpeople.Manyeyewitnessessaidtheysawabrightflashedacrosstheskywhichwas用心爱心专心followedbyadeafeningroarjustbeforetheshakingbegan.)ThenshowsomepicturesofthecityofLoulan.Askthestudentssomequestions.Whatcityisinthepicture?Whatcausedthecityofloulantodisappear?(ItwasgraduallycoveredoverbysandstormsfromAD200toAD500.)Whatcausedthesandstorms?Canyouthinkofotherwaysinwhichpeopledamagetheenvironment?Step4TalkaboutproblemsoftheearthBesidesnaturaldisasters.theearthisnowfacingotherproblems.Letstrytofindsomeofthemandtheeffects,thecausesandthesolutionstothem.WaterpollutionAirpollutionrubbishDeforestationDeforestationproblemsDesertificationDesertificationAnymore??WarmingupWarmingupWaterpollutionEffectsManypeopledon’thaveenoughcleandrinkingwater.Makepeoplegetsick.CausesFactoriespourwasteintorivers/lakes/seas.Peoplethrowrubbishintorivers/lakes.SolutionsUsenewtechnologytomakesurethatfactoriesaregreenandclean.Cleanthewaterintherivers/lakes.Savewaterinourdailylife.用心爱心专心AirpollutionEffectsMakepeoplegetsickorevendie.Maketheenvironmentdirty.Causeacidrain(酸雨).CausesFactories,powerstations,cars,airconditionersgiveoffwastegas.Burncoalandoil.SolutionsTheharmfulsmokeshouldbemadeharmlessbeforeitgoesintotheair.Ridebikesmore.Limitthenumberofcars./Makecarsthatdon’tpollutetheair.Rubbish/wastepollutionEffectsMaketheenvironmentugly,dirtyandevendangerous.Causediseases.CausesThrowrubbishinthestreetsorinnature.Buyproductsthatusetoomuchpackaging.SolutionsThrowwasteinrubbishbins.Buyproductsthatuselesspackaging.Recycleasmuchaspossible.DeforestationDesertificationEffectsCausebadweather(sandstorm).Landsormountainsturnintodesert.Causestarvation.CausesCuttoomuchwood.Richsurfacesoilwillbeblownawaybywindorwashedbyraindowntohillsandintorivers.SolutionsUselesswood.Plantmorenewtrees.Trytomakedesertareasbecomegreenland.starvationEffectsCausesocietyproblems:violence,crime…用心爱心专心Manypeopledie.CausesWarsUnevendistributionsofwealthLackofeducationSolutionsNowars;Richcountriesshouldhelppeoplewhocan’tgetenoughfoodoreducation.Step5.CompetitionAsastudent,whatcanyoudotoreducewastepollutionandprotectourenvironment?Discusswithyourpartnersandwritedownthethingsyoucando.Dividetheclassintotwogroups.Thegroupwhichhasmoreideaswillbethewinner.GROUPA:GROUPB:Step6SummaryandHomeworkTodaywehavetalkedabouttheenvironmentoftheearthandthewaystosolvetheearth’sproblems.Afterclass,pleasethinkmorewaystoprotectenvironment.Andpreviewnextperiod.用心爱心专心
