

版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
1、unit 13 the water planet教案unit13thewaterplanetperiod1readingteachinggoals:.togetthesstounderstandthemainpropertiesofwaterbyconnectingthemwithsomecommonphenomenaandlearningtoexplainthephenomena.2.toenablethemtobeawareoftheimportanceofwater,makinggooduseofwaterinaproperwayandprotectingwaterresources.t
2、eachingsteps:step1:leadinreadashortpoemandguessitsname:aletterfrom_.dearuser,shametoyouall,theignorant,iamyourlifebutyouseemnottovaluemegivemealltherespectforinmeiseternallifeifyoucontinueabusingmesurely,allformsoflifewillwitherawayhaveyoueverimagined,lifewithoutme?itellyou,itwillbeunbearablethinktw
3、iceforeverydropcounts.qs:1)whatdoes“dearuser”herereferto?2)whatdoesittalktoitsusers?3)onwhichplanetdoesitexist?ontheearth,whichisalsocalledthewaterplanet.4)doyouknowwhyitiscalled“thewaterplanet”?becauseaboutthreequartersoftheearthiscoveredbywater.step2:pre-readinglookatthetitlesinthetextbelow.donotr
4、eadthewholetext.pickoutthesubjectofeachparagraph.usethestructuresbelowtomakesixquestionsrelatedtothesubjects.step3:whilereading:.skimtofindbasicfactsaboutlifeintheoceansfromtheopeningparagraph:lifeonearthbeganintheoceansaboutthreebillionyearsago;99%ofthelivingspaceonearthisintheoceans;thereareaboutf
5、ivemillionspeciesintheoceans;lifeintheoceansrangesfromtinyplanktontogiantwhales.2quiz:trueorfalsequestions:)waterisaliquidatroomtemperature,andithasarelativelyhighfreezingpoint.2)thereasonwhywatercandissolvemostsubstancesonearthisthatwaterhashighheatcapacity.3)likealltheothersubstances,watergetssmal
6、lerwhenitfreezes.4)purewaterhasahigherfreezingpointandlighterthansaltwater.5)thesalinityoftheearthsoceansisabout3.5%.6)whenwaterfreezes,itsdensityincreases.7)otherrecoursessuchasoil,gas,goldetcisaspreciousasadropofrain.8)thereareaboutfivebillionspeciesintheoceansrangingfromthetiniestplanktontogiants
7、likesharksandwhales.9)thewatermoleculeismadeoftwohydrogenatomsandoneoxygenatom.0)purewaterhasahigherfreezingpointandislighterthansaltwater.1)ifasubstancehasadensity888kg/m3,itwillfloatonwater.2)theheatcapacityisrelativelyhigh,sothatmostanimalsdontlikelivinginit.3)themostimportantthingwecanlearnabout
8、water,isthatwemustprotectitanduseitwisely.3.multiplechoices:1.basedonpara.i,theauthortellsusthattherearevariousspeciesintheoceans,indicatingthat_.a.waterplaysagreatroleformarinelife.b.oceanisagoodplaceforlife.c.therearemanyreasonsfortiniestplanktonandgiantslikesharksandwhalesd.oceanispartoftheearth2
9、.thewaterintheoceanisalwaysmovinginthat_.a.thetemperatureofseawaterisrelativelyhigh.b.watersdensityaffectchangesinsalinityandtemperature.c.changesinsalinityandtemperaturehaveeffectonwatersdensity.d.watersinriversalwaysflowintotheocean.3.generallyspeaking,humanbeingsare_tolargeorsuddenlychangesintemp
10、erature.a.generousb.objectivec.subjectived.sensitive4.canyouanswerthefollowingquestions?)whatistheimportanceofthechemicalstructureofwater?thechemicalstructureofwatermakesitanexcellentmediumforlifeandalsomakesitdifferentfromalmosteverythingelseonearth.2)whatisthesalinityoftheearthsoceans?thesalinityo
11、ftheearthsoceansisaboutthirty-fivepartsperthousand,meanigthatthereareabout35grammesofdissolvedsolidsandgasesinonekilogrammeofwater.3)howaboutdensityandheatcapacity?densityistherelationshipbetweenmassandvolume,measuredinkilogrammespercubicmetre.heatcapacitytheamountofenergyittakestoraisethetemperatur
12、eofasubstancebyonedegreecentigrade.5.furtherunderstandingbylookingatsomepictures:readfollowingstatementandthinkwhatconclusionyoucandraw?orwhatpropertydoesitreferto?itissaidthatamanof60kglosesabout1lwaterthroughbreathandskinevaporationeveryday.inotherwords,539kcalheatisreleasedinthesetwoways.ifsomuch
13、heatwerekeptinhumanbody,itwouldraisebodytemperatureby9.canyouimaginetheresult?waterhasarelativelyhighheatcapacityandcanaccommodatetheclimateautomatically.itcanabsorbandreleasealotofheatwithoutbigchangesinitstemperature,thuscreatingastableenvironment.herearesomemorefamiliarphenomena,whatpropertyofwat
14、eraretheyrelatedto?thecoastalareasareoftenneithertoohotnortoocold.icefloatsonwater.whentheseawaterinacontainerisevaporated,therewillbesomesaltleft.irrigateinwintercanhelpraisethesoiltemperature.peopleswimminginthedeadseafloat;theycanevenreadapaperwhilelyingontheirbackinthewater.discussion:inthepassa
15、gemanypropertieshavebeentalkedabout.arethereanyotherpropertiesyouthinkimportantnotmentioned?homework:trytothinkasmanyexamplesaspossibletoshowthatwaterismadeuseoftobringbenefittohumanbeings.period2post-reading&listeningteachinggoals:.togetstudentshaveabetterunderstandingofwater.2.tolearnsomenewwo
16、rdsandsentencestructures.teachingprocedures:partonepost-readingi.betterunderstandthepropertiesofwater.“wherethereiswater,thereislife!”canyouusesomefactstoillustrateit?waterisamediumforlife.sofarasweknow,lifeonlyexistsonearth,becausethereiswater.etc.2.ourplanetisawaterplanetofwhichtwothirdsofitssurfa
17、ceiscoveredbywater.whatsmore,ourbodyisalsomainlycomposedofwater.doyouknowfollowingfigureswhichshowhowmuchwaterthereisinpartsofourbody?60%,70%,82%,90%upto_ofthehumanbodyiswater._ofthebrainiscomposedofwater._bloodismadeupofwater.thelungsarenearly_water.3.wateristhesourceoflife.thatswhywaterisanexcelle
18、ntmediumforlife.andyouknowallthisisbecauseofwatersuniqueproperties.ii.revisiononthepropertiesofwater.whatarethepropertiesofwater?waterispolar.waterisliquidatroomtemperature.waterhasarelativelyhighfreezingpoint.waterhasdensity1,000kg/m3.waterhashighheatcapacity.2.whatcauseswatertohavesuchuniqueproper
19、ties?itsmoleculeform/chemicalstructure.3.whatiswatermoleculelike?chemicalstructure:twohydrogenatomsandoneoxygenatom.differentpartsofit:aslightlypositiveendandaslightlynegativeend,soitispolar.thefunctionofit:itcauseswatertobeabletodissolvebothsolidsandgases,andthatswhywatercanbreakdownnutrientsquickl
20、y.iii.reflection.thereisacloserelationshipbetweensomepropertiesofwater,forexample,salinity,densityandoceanmotion.howdotheyaffecteachother?2.supposeyouareoneofthemainpropertiesofwater.youthinkyouarethemostimportantandhavethegreatesteffectonlife.trytopersuadeothersbydescribing:1)whatyouare.2)whataffec
21、tsyou.3)whatyouaremadethemostofbyhumanbeings.parttwolisteningi.pre-listeninggiveaverybriefintroductionoftherimeoftheancientmarineranditsauthorsamueltaylorcoleridge.hererimeisthevariantofrhyme.ii.while-listening.listentothestoryandfindtheinformationaboutit.when:18thcentury?where:onashipwho:sailors/ma
22、rinerswhat:oneofthesailorskillsabirdthatbringsgoodlucktotheship,bydoingwhichhehasbroughtbadluckanddeathtothesailors.2.listentopart1forthesecondtimeandfinishthefollowingtrueorfalsequestions.)thispoemwaswrittenbyabritishpoetsamueltaylorcoleridgeinthe1700s.2)inthepoem,oneofthesailorskillsafishunderthes
23、hip.3)itisbelievedthattheanimalhekillsisonethatbringsgoodlucktotheship.4)othersailorsaresofrightenedandangrythattheykillthesailor.5)thesailorsareextremelythirstybuttheycantdrinkthewaterinthesea,becauseitistoodirty.3.listentopart1forthethirdtimeandanswerthefollowingquestions:)whotellsthestoryinthepoe
24、m?2)whatdoesoneofthesailorsdo?3)whatdoyouthinkwillhappennext?4)whyaretheothersailorsfrightened?4.listentopart2andcompletethefollowingsentences.)finallytheydecidethathemustdie_themarinerwho_thebird.2)hemust_itallandwill_byhavingtotellthestory3)_ontheship,_ontheocean,themarinersuffersfrom_and_.4)hisst
25、ory_,the_marinersays_andasksthemtolearnfromhis_.keys:1)except,shot;2)livethrough,pay3)leftalone,drifting,loneliness,fear;4)told,ancient,farewell,sufferings5.listentopart2againandanswerthefollowingquestions:)whathappenstothesailors?2)whathappenstothemariner?3)whyisthepersontellingthestory?4)whoisthep
26、ersonactually?ii.while-listening.reflection:whatdoyoulearnfromthisstory?everythingexistingintheworldhastheirowncertainvalues,weshouldunderstandandrespectthem.2.creationworkwithpartnerandtrytocomeupwithagood,scarystoryliketheoneaboutthemariner.homework.previewintegratingskills“naturesnursery:estuarie
27、s”onpage22period3integratingskillsteachinggoals:.togetstudentstoknowwhatestuariesareandtheirfunctions2.tolearntowriteanexplanationparagraphteachingprocedures:i.lead-inlookatthemapofchina,answerthesequestions:.canyounamethethreecitiesmarkedonthemap?wherearethey?i2.howmuchdoyouknowaboutthem?istheecono
28、mytherewell-developedornot?3.whichcityisthemostdeveloped?why?nowletslookatthismapandthenanswerthefollowingquestions:.canyoutellwhatmapitis?whereisit?2.isthewaterheresaltyorfresh?3.whatstheplacecalledwhereriverandtheoceanmeet?ii.while-reading.skimming)findoutthedefinitionofestuary.2)whatfunctionsofes
29、tuarieshavebeenmentionedinthepassage?3)discussion.whatlivingconditionsdoyouthinkareneededfornaturesyoungones?doestuarieshavesuchconditionsforthem?2.discussionwhatlivingconditionsdoyouthinkareneededfornaturesyoungones?doestuarieshavesuchconditionsforthem?3.scanthepassageandanswerthefollowingquestions
30、.whyareestuariessuchgoodplacesfornaturesyoungones?whatdoes“density”meaninthispassage?howdoestuariesaffectthewaterthatpassesthroughthem?whyareestuariesmoresensitivetopollutionthanotherareas?whyareestuariesimportanttohumanbeings?inestuaries,animalscanenjoyallthebenefitsoftheoceanswithouthavingtofacema
31、nyofitsdangers.tidesprovideenergyfortheecosystems,butestuariesareprotectedfromwavesandstormsbyislands,mudorsand.nutrientsfromboththelandandtheoceanarriveinestuaries.itmeansthedegreetowhichanareaisfilledwiththingsorpeople.theyabsorbnutrientsandpollutantsfromwatercominginlandsources,thuscleaningourwat
32、er.becauseestuariesactasfilters,manypollutantsendupinthem.estuariesprovidebothrecreationandeducationforhumanbeings.forexample,peoplecanfish,swimandhavefunonthebeach;scientistsandstudentshaveendlessopportunitiestostudyavarietyoflifeinthehabitat.estuariesalsocontributetotheeconomythroughtourismandfish
33、ing.4.finishthefollowingpassagewithwordsfromthetext.estuariesarebodiesofwateralongcoaststhatare_whenfreshwaterfromrivers_withsaltwaterfromtheocean.inestuaries,thefreshriverwaterisblockedfromstreamingintotheopenoceanbyeithersurroundingmainland,orislands.thismixingoffreshandsaltwater_auniqueenvironmen
34、t_withlifeofallkinds-azonebetweenthelandandseaknownasanestuary.theestuarygathersandholdsa_oflife-givingnutrientsfromthelandandfromtheocean,forminganecosystemthatcontainsmorecreaturesthananyother_ontheearth.estuariesarealsoimportantforhumanbeings.theyprotectwaterqualityby_pollutantsfromwatercomingfro
35、minlandsources.theyarecentersfor_andeducation.estuaries,inshort,aretreasures.iii.post-readingdiscussionaswelearnfromthispassage,manycitieswhicharebuiltaroundestuaries,likeshanghai,guangzhou,ningbo,shenzhenareverydeveloped.canyouexplainwhy?iv.writingdoyoustillrememberwhatwelearnaboutthepropertiesofwa
36、ter?inthatpassage,thewriterintroducesthechemicalstructureandseveralpropertiesofwatertous,suchassalinity,density,heatcapacity.sofromthisweknowwhenweareexplainingwhatsomethingisorhowthingshappen,itisimportantthatourexplanationsshouldbewellorganizedandeasytounderstand.tiponeifwearedescribingaprocess,we
37、dbetterexplaineachstepintheorderithappens.tellthereadersaboutthecausesandeffectsandusewordslikefirst,second,then,etctoshowtheorderofthesteps.firstsecondthird/thenlasttiptwoifwearewritingaboutsomethingthathasseveralparts,weshoulddescribeeachpartandexplainitsfunctionandstructure.thefollowingquestionsm
38、ayhelp:whatisit?howmanypartsisitmadeupof?whatsthestructureofeachpart?howdoesitwork?homeworkimaginethatyourscienceteacheraskyoutoexplainoneofthefollowingquestions:whydoesanicecubefloat?whatwillhappentoapieceofmetalifyouputitinwater?whydosomanyspeciesliveinestuaries?whyhavesomanycitiesbeenbuiltbyestua
39、ries?chooseoneofthequestionsandwriteapassage,usingwhatyouknowaboutnatureandscienceandwhatyouhavelearnedfromthisunit.period4grammarandwordstudyteachinggoals:toreviewmodalverbs.tomakestudentsgetmorefamiliarwiththemodalandpractiseusingthemindifferentsituations.toenablestudentstomastersomenewwordsandexp
40、ressions.teachingprocedures:partone:grammarmodalverbsrevisionwehavetalkedaboutthepropertiesofwaterandweknowthatwatercanbeusedinmanywaysduetotheseproperties.sopleaseanswerthefollowingquestions.whatarethesepropertiesofwater?canyougivesomemoreexamplesthatshowwecanbenefitfromthesepropertiesofwater?accor
41、dingtotheabovediscussion,weknowthatthesepropertiesofwaterareveryimportantandhelpusalot.justbecauseofthesepropertiesofwater,watercanmeetpeoplesneedsoflivingontheearth.wecansaythatwateristhe“lifefood”oftheearth.itisanecessityofhumanbeingsandalltheotherlivingthings.however,haveyoueverimaginedthefollowi
42、ngsituations?ii.presentationwithoutoceanmotion,whatwouldtheearthbelike?ifthedensityoficewerelargerthanthatofwater,whatwouldtheseabedbelike?supposewaterhadamuchlowerfreezingpoint,whatwouldtheworldbelike?iii.trytolistsomemodalverbsaccordingtotheirfunctions.possibilitycertaintyabilitypermissionrequests
43、uggestionsnecessityadviceiv.moresituationsgiventopracticeusingmodalverbs.situationone:asmanyas7billionpeoplethroughouttheworldcouldfaceawatershortageby2050ifthepresentsituationcontinues.bythen,theglobalpopulationisexpectedtoreach9.3billion.manybigcities,includingbeijing,shanghaiandtianjin,willsuffer
44、severewatershortages.)ifitistrue,whatmayhappeninthefuture?2)whatcanourcountrydowiththisproblem?3)whatshouldwedoinourdailylife?situationtwo:threegorgesprojectisthelargestwaterconservancyprojecteverbuiltinthewater.itissaidthatthewholeprojectwillbecompletedintheyearxxasplanned.sotrytodiscussthefollowingquestions:)iftheprojectiscompletedintheyearxx,whatadvantageswillitbringtous?2)iftheprojectiscompletedintheyearxx,whatproblemsmayitcause?howcanwedealwiththeseproblems?whatshouldwedotosolvetheseproblems?v.consolidati
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 聚焦2025导游证资格考试核心试题及答案
- 系统性学习营养师考试试题及答案
- 食品与营养传播策略试题及答案
- 2024年营养师资格考试最后冲刺试题
- 2024营养师考试决胜技巧与核心试题
- 房地产售后服务流程试题及答案
- 演出经纪人资格证学习方法试题及答案
- 深入分析演出经纪人考试试题及答案
- 科学饮食与健康指导试题及答案
- 西行漫记中考题及答案
- 身份证籍贯自动对照自动生成
- DG-TJ 08-2367-2021 既有建筑外立面整治设计标准
- 教育测量与评价智慧树知到答案章节测试2023年石河子大学
- 全国各主要红色教育基地
- 2023年新HSK5级考试真题考试
- 应用文写作课件:3投诉信letter of complaint
- GB/T 6177.2-2000六角法兰面螺母细牙
- GB/T 4100-2015陶瓷砖
- GB/T 28022-2021玩具适用年龄判定指南
- GB/T 17755-2010船用额定电压为6 kV(Um=7.2 kV)至30 kV(Um=36 kV)的单芯及三芯挤包实心绝缘电力电缆
- 部编人教版语文六年级下册《2 送元二使安西》课件
评论
0/150
提交评论