Unit8AgreenworldWeletotheunit课件译林版英语八年级下册

Welcometotheunit八年级下册Unit8AgreenworldLead-in1.Whatcanyouseeinthepicture?2.Whydoyouthinkleavesareusedtomaketheshape

inthepicturehere?

Usingleavesshowsourcarefornatureandourdesireforagreenerworld.Whenwecarefornature,naturecaresforusinreturn.Lookatthepictureandanswerthefollowingquestions.Icanseeasignmadeupofmanygreenleaves./Theleavesformashapelikearecyclingsymbol.becomemoreawareofhowtoprotecttheenvironment.talkandwriteabouthowtogogreen;readaboutagreencountry;2413Inthisunit,wewill

Whatwillwedointhisunit?Lead-inlearnaboutenvironmentalproblems;Whatkindsofpollutiondoyouknow?Air/Water/Noise/Soil/Light/Plastic/Garbagepollution...FreetalkPresentationsoilpollutionnoisepollutionairpollutionwaterpollutionWhatcanyouseeinthepictures?Fourtypesofpollution.PresentationCuttingdowncarsSmokefromfactoriesWastewaterPractice

TheClass1,Grade8studentsarelearningaboutpollution.Talkaboutothercausesofthefourtypesofpollution.AOver-usingchemicalfertilizersandwastefromfarms...Loudmusicinpublicandfireworksatfestivals...Burningleavesand

stalksandsmokefrombarbecues...Trashendingupinriversanddirtywaterfromwashingdishesandcars...PresentationMillieandDanielaretalkingaboutreducingpollution.Listentotheconversationandcompletethetablebelow.BTypeHowtoreducepollutionAirpollution(1)

___________________________ortakethebus.(2)

_____________ifweliveclose.(3)

Plantmoretrees.WaterpollutionUsemoreeco-friendlycleaningproductsSharearidetoschoolwithothersRideabikePresentationListentotherecordingoftheconversationandreadalong,andthenreadaloudindifferentroles.PracticeWorkinpairsandtalkabouthowtoreducesoilpollutionandnoisepollution.Toreduceairpollution,wecansharearidetoschoolwithothersortakethebus.Ifweliveclosetotheschool,it’sbettertorideabikeorwalkthere.Wecanalsoplantmoretreesanduselessairconditioning....PracticeAssomeriversdon’tlookcleanorclear,weshouldusemoreeco-friendlycleaningproductstoreducewaterpollution.Neverthrowrubbish,especiallyplasticandbatteries,intoriversorlakes.Remembertosortrubbishandsendittotherightplace...Workinpairsandtalkabouthowtoreducesoilpollutionandnoisepollution.WorkinpairsandtalkabouthowtoreducesoilpollutionandnoisepollutionusingtheconversationinPartBasamodel.PracticeA:Whatcanwedotoreduce

...

pollution?B:It’sagoodideato...A:Yes.Wecanalso

…B:Iagree.Andwhatabout...

pollution?…A:Weshould

…B:Yes.Thatwillreduce

...

pollution.

DiscussionWhichtypeofpollutionisthebiggestprobleminyourhometown?Explain.Version1:Inmyhometown,airpollutionisthebiggestproblem.Manyfactoriesgiveoffblacksmoke.Also,therearetoomanycarsontheroads.Theirexhaustmakestheairdirty.Onfoggydays,wecan’tseefarandmythroatfeelsbad.

DiscussionWhichtypeofpollutionisthebiggestprobleminyourhometown?Explain.Version2:Ithinkthebiggestenvironmentalprobleminmyhometownissoilpollution.Itcomesfrommanythings,likethrown-awaycigarettebuttsandtoomuchchemicalfertilizeronfarms.Whatcanwedotosolvethebiggestproblemandliveagreenlifeinourhometown?DiscussionWorkingroupsandtalkaboutthequestionbelow.Let’sFixAirPollutioninOurHometownFirst,factoriesshouldcleantheirsmoke.Theycanusemachinestomaketheblacksmokecleanbeforelettingitout.Ifsomefactorieskeeppollutinganddon’tchange,thegovernmentshouldpunishthemaccordingtolaworevenclosethem

down.DiscussionSecond,wecanridebikesortakebusesmore.Studentscanridebikestoschool,andgrown-upscantakebusestowork.Fewercarsmeanlessexhaust.Maybewecanalsodrive

electriccars—theydon’tmakeexhaustatall!

Let’splantmore