Unit2Topic2SectionATopic3SectionD课件仁爱科普版（2012）九年级英语上册

Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.sandstormHowdoesthesandstormcomeintobeing?washtheearthawaymanytreeschangeintodesertforestsgonesandstormscomeintobeingcutdowntrees3.Numberthepicturesabouthowsandstormscomeintobeing.415362Once,thereweremanytreesintheforests.Butpeoplestartedtocutdowntrees.soon,theforestsweregone.Withouttrees,windandrainbegantowashtheearthaway.Asaresult,alotofrichlandhaschangedintodesert.Now,whenthewindblows,sandstormscomeintobeing.Therewerefewertreesleft,sothewindalwaysblowstheearthaway.Peoplehavecutdownsuchalargenumberoftreesthatthelandhaschangedintodesert.Task1ListeningforgistTheboyandgirlsaretalkingabout______.A.differenttypesofsandstormsB.thereasonsforsandstormsC.sandstormsindifferentcities✔Task2ListeningfordetailsfactsThewindoutsideisblowing_________.Kangkangsaw________insandstorms.cause_______cutdowntoomanytreesresultAlotof_____landhaschangedintodesert.solutionBuilt“The_______GreatWall”stronglynothingPeoplerichGreenTask3ListeningfordetailedcomprehensionTreescanstopthe_______fromblowingtheearthaway.Treescanstopthe_______fromwashingtheearthaway.Alotofwatercanbesavedby_________.windforestswater(Kangkang,MariaandJanearetalkinginaroom.Thewindoutsideisblowingstrongly.)Maria:Whatastrongwind!Kangkang:Yes.Butit’sbetterthanthelastfewyears.Thereweresandstormsbefore.WhileIwaswalkingdownthestreet,Icouldn’tseeanything.

Thesandreallyhurtmyface.Maria:Whywastheweathersobad?Jane:Peoplecutdowntoomanytrees.Asaresult,alotofrichlandchangedintodesert.Treescanstopthewindfromblowingtheearthaway.Kangkang:Andalotofwatercanbesavedbyforests.Jane:Treescanalsostopthewaterfromwashingtheearthaway.Maria:Cuttingdowntreesaffectstheweathersomuch.Kangkang:Yes.Itisharmfultohumanbeings,animalsandplants.Althoughthereweresandstormsbefore,nowwehavebuilt“TheGreenGreatWall”.Ourenvironmenthasbecomemuchbetter.肥沃的土地刮得猛烈cutdown砍伐，缩减结果是change…into=turn…into把…变成stop/prevent/keep…fromdoingsth.阻止…做某事blowaway吹/刮走树木可以防风固土。它们还能防止水土流失。森林可以储存大量的水分。人类绿色长城好大的凤啊！Task4Post-listening:Listenandfillintheblanks.1.Nowsomekindsofanimalsarebecoming___________________.2.Someanimalsare______________dyingoutcompletely.3.Inthepast,pandaslivedaquietlifeandhad

__________food.4.Humanshave_________________

theimportanceofprotecting

animals.5.Weshould____________toprotectthem.in

dangerofplentyofcome

tounderstanddoourbestfewer

andfewerbeindangerofdoingsth.

处于做某事的危险中dieout灭绝很多的，大量的…的重要性do/tryone’sbesttodosth.尽某人最大的努力做某事Task5Post-listening:Completethesentenceswiththecorrectformsofthegivenphrasesinthebox..asaresult,changeinto,dosomething,stop…from,blow…away1.Peoplehavecutdownsuchalargenumberoftreesthattheland

_________________desert.2.Therearefewertreesleft,sothewindalways_______theearth______.3.Airpollutionhasbecomeaseriousproblem,sowemust___________

toreduceit.4.weshouldtryourbestto_____people______cuttingdownthetrees.5.Inthefuture,humanbeingscanprotectthetreeswell._____________,animalswillliveahappylifeintheforest.haschangedintoblowsawaydosomethingstopfromAsaresultanumberof+pl.+谓复许多；大量thenumberof+n.+谓单…的数量Anumberofmyfriends______Ishouldtakeaholiday.(think)我的一些朋友认为我应该休假。Thenumberofstudents______abouttwenty.(be)学生人数大约是20人左右。thelungsoftheearthP49Task1ReadingformainideaPara1Para2Para3Thedifficultiesfacedbytree-plantingvolunteersThecontributionandsignificanceofChinesevolunteersTheimportanceofforestsandthereasonfordeforestationForestshelptheEarthbyremoving_________________andmaking_________.CountrieslikeNewZealand,Canada,andBrazilcutdownforeststo___________________________________.Volunteersplanttreesduringtheir__________.Thedifficultiesvolunteersfaceincludebadweather,__________,and_________________________________.Chinesevolunteersuse____________________tohelpplantmoretrees.Task2Readingfordetailcarbondioxideoxygenprovidewoodtobuildhousesholidaysinsectsdangerousmountainsnewtechnologiesthelungsoftheearthfunctionsdeforestationreasonsremovecarbondioxidemakeoxygenprovidewoodtobuildhouses1.Importance&threat2.Volunteers’difficultiesweatherinsects(bite)physicalchallengescarryheavybagsofsmalltreesdangerousworkinthemountains3.Chinesevolunteers’rolemethodsusenewtechnologiesachievements&impactplantmillionsoftreeseveryyearmakelocalgovernmentbetterhelpthewholeworldForestsarethelungsoftheearth.Withoutthem,itcannotbreathe.Itneedsitsforeststoremovecarbondioxidefromtheairandtomakeoxygen.Inmanycountries,suchasNewZealand,Canada,andBrazil,forestswerecutdowntoprovidewoodtobuildhouses.Manyvolunteersaroundtheworldareworkingintheirholidaystoplantnewtreestoreplacethem.Theyfacemanydifficultieswhenplantingnewtrees.Theweathermaybeveryhotanddryoritmaybeverycoldandwet.Thereareoftenmanyinsectsthatbitetheseplantersontheirlegs,arms,andfaceswhiletheywork.Theycarryheavybagsofsmalltrees,andworkinginthemountainscanbedangerous.Chinesevolunteershavehelpedplantlotsoftreesaroundtheworld.Theyhavebigplanstogrowmoreforestsandhaveusednewtechnologiestoreachtheirgoals.Byplantingmillionsoftreeseveryyear,theyarenotonlymakingtheirownenvironmentbetterbutalsohelpingthewholeworld.ThisshowsthatChinesereallycareabouttheearth.remove…from…从…移除bitesb.on/inthe+身体部位

（face,eye,chest,stomach用in;head,ear,shoulder,leg用on）关心，在意1.猛烈地吹

____________________2.

砍倒

_____________________3.结果

_______________________4.肥沃的土地

___________________5.变成

_________________6.阻止

_______________________________7.吹走

___________________8.对...有害

____________________________9.人类

___________________________10.绿色长城

______________________blowstronglycutdown