初中八年级英语课件Unit Trees

PollutionFightersPeriod1JackieWangAquizabouttreesWhenistheTree-PlantingDay?February14th

March12thMarch14th

AquizabouttreesWhicharetheoldesttreesontheearth?pinetrees(松树)oaks(像树)ginkgoes(银杏树)AquizabouttreesHowlongdotreesliveonaverage?150years.4000years.70years.AquizabouttreesWhichofthefollowingthingscomefromtrees?A.nutsB.cottonC.teaD.beansE.oilF.rubberAquizabouttreesWhichkindofpollutiondotreeshelpfight?airpollutionwaterpollutionnoisepollutionalloftheabove【Readtheintroduction,Line1-4】Ascientist.Trees.(Becauseshewanted)tocollectsomefactsforaclassprojectonpollution.Becausethey’rethebiggestandoldestlivingthingsontheEarth.1.WhatisDoctorRay?3.Whataretheytalkingabout?2.WhydidJudyinterviewDr.Ray?4.WhyisDr.Raysointerestedintrees?【ReadLine5-24】Whatgoodaretrees?n.好处comefromtreestreesmakestreetsmorebeautifulandlessnoisystreetsrubberpaperfruitwoodairTreesprovidealotofusefulthingsforpeople.…takeharmfulgasesfromtheairrelease

oxygen

backintotheair

[‘Dksidʒən]氧气clean

theair/maketheairpurecool

theairTreescooltheairaswellascleantheairIntroducethegoodoftreesmakestreets…provide…suchas…clean

take…fromrelease…into1.5hectares…/keep…aliveandhealthy…coolnaturalairconditionersthree…dothejobof…15…alldayaswellasYoucanbeginwith:Treesdomuchgoodtous.They…Wheninsectsattack

atree,itcanwarn

itsneighbours.Somefactsabouttrees2.Treesproduceachemicaltoprotectthemselves.3.Sometreescanjointheirrootsundergroundandpassfoodandwatertoeachother.IsthatTrue?TTT4.Treescancommunicatewitheachother.THowdotreescommunicatewithoneanother?Howdotreesprotectneighbours?Howdotreesprotectthemselves?Howdotreespassfoodandwater?Wheninsectsattackthem,theycanwarntheirneighbours.Theyprotectthemselvesbyproducingachemicalthatmakestheirleavestastenasty.Theycanjointheirrootstogetherunderground.(unpleasant)Howaretreesnow?cutdownburnreplacehardlyanyofthemingreatdangerdestroyGroupdiscussionWhatshouldwedo?realizetheimportanceoftakingcareoftreeslookafternewtreeswriteonbothsidesofpaperuseclothbagsforshoppingtrynottousedisposablechopsticks(一次性筷子）make

sometreeprotectionlaws……Weshould:Judy’sreport:IinterviewedDr.Rayabouttreesandgotalotoffactsaboutthem.Treesarethe________and_______livingthingsontheEarth.Treesdomuchgoodtoourlife.Forexample,they______________________________________________.Also,theyprovideuswithalotofthingssuchaswood,paperandsoon.Besides,treescan_____________________________.They_______harmfulgasesfromtheair,and_________oxygenbackintotheair.Theyarecalled______________________.Threetreescan________________fifteenairconditioners.Isn’titsurprising?Anotherinterestingfactisthattreescan_______________________________.Forinstance,theycanpassfoodandwaterby________theirrootstogetherundergroundandcan_________themselvesfrominsectsaswellas________hisneighboursofdangers.However,treesare________________becausepeoplecutdownandburnmillionseveryyearand____________________________.Therefore,it’shightimeforustotakeactiontosaveour___________________–trees!biggestoldestmakestreetsmorebeautifulandlessnoisycooltheairaswellascleanittakereleasenaturalairconditionersdothejobofcommunicatewitheachotherjoiningprotectingreatdangerreplacehardlyanyofthempollutionfighterswarnFromnowonTryourbesttotakecareofeachtreeIbelieveonedayTheskywillbemoreblueTheairwillbefresherThewaterwillbemoreclearThecitywillbemorebeautifulWewillbemuchhappierAssignmentOralwork:

Readthetextatleasttwice.Writtenwork:

Writeatleast60wordsaboutTrees.

1.Whatdoyouthinkoftrees?

Why?2.Howcanweprotecttrees?ThanksalotHowmanytreescankeepourwholeclassaliveandhealthy

forawholeyear?a.0.15hectareb.1.5hectaresc.15hect