2023年teaching plan for unit 13(人教版高二英語下冊(cè)教案教學(xué)設(shè)計(jì))

慎而思之，勤而行之。斯是陋室，惟吾德馨。第第2頁/共2頁精品文檔推薦2023年teachingplanforunit13(人教版高二英語下冊(cè)教案教學(xué)設(shè)計(jì))收拾\Teachinggoals:

1.Talkaboutwaterandtheocean

2.Practicecommunicativeskills

3.ReviewModalVerbs

4.Writeanexplanationparagraph

TeachingPlan:(SixPeriods)

1stperiod:Warming-upandReading(1)

2ndperiod:Reading(2)

3rdperiod:post-readingandListening(SB)

4thperiod:IntegratingSkills(SB)

5thperiod:Speaking

6thperiod:GrammarandLanguageStudy

Period1WarmingupReading(I)

Teachinggoals:

1.TogettheSstounderstandthemainpropertiesofwaterbyconnectingthemwithsomecommonphenomenaandlearningtoexplainthephenomena.

2.Toenablethemtobeawareoftheimportanceofwater,makinggooduseofwaterinaproperwayandprotectingwaterresources.

Importantpointsinteaching:

Words:benefit,available,pure,mass,float,absorb,release,stable,bottom,habitat,

dissolve,property.

Phrases:benefitfrom,rangefrom…to….,alltheway,bemadeupof,thatis,

freezingpoint,breakdown,mixwith,bemeasuredin,takeadvantageof,

keep…steady,manageto,besensitiveto,upto.

Structures:whatever….,…..,thatis,…..

Teachingprocedures:

Step1:Leadin

Readashortpoemandguessitsname:Aletterfrom_______.(Water)

DearUser,

Shametoyouall,theIgnorant,

Iamyourlife

Butyouseemnottovalueme

Givemealltherespect

Forinmeiseternallife

Ifyoucontinueabusingme

Surely,allformsoflifewillwitheraway

Haveyoueverimagined,

Lifewithoutme?

Itellyou,itwillbeunbearable

Thinktwice

Foreverydropcounts...

Qs:1)Whatdoes“Dearuser”herereferto?

2)Whatdoesittalktoitsusers?

3)Onwhichplanetdoesitexist?－Ontheearth,whichisalsocalledthewaterplanet.

4)Doyouknowwhyitiscalled“Thewaterplanet”?

－Becauseaboutthreequartersoftheearthiscoveredbywater.

Step2:Pairwork:Collectasmanywordsaspossiblerelatedtowater.Qs:

Howmuchdoyouknowaboutwater?

Isallwaterfreshorsalty?

Step3:Talkaboutthepropertiesofwater.

1.Pairwork

T:Waterisaroundusandinsideus.Wecan’tgowithoutwater.Qs:

Whyiswatersoimportanttolivingthings?

Canyoupointoutsomeofitspropertiesorcharacteristics?

Suggestedvocabulary:

It'scolorless,tasteless,odorlessanduniversaldissolvent.

Itfeelswet;

Itexistsinthreeforms:liquid,solid,gas,andiscycledthroughthewatercycle;

Itcanabsorbalargeamountofheat;

Itstickstogetherintobeadsordrops;

It'spartofeverylivingorganismontheplanet;etc.

2.Groupwork

Learnmoreaboutwater’spropertiesbydoingsomesimpleexperimentsandlearntodescribeanexperiment.

Whatpropertyofwaterdoeseachofthefourexperimentsillustrate?

Whatcausesthisphenomenon?

What’sthisphenomenonrelatedto?

①Experiment1showshowairpressurecausesapieceofthickpapertoclingtoanupturnedglassofwater.

②Experiment2illustrateshowsubstanceswithdifferentdensitybehavewhenplacedinthesamecontainer.

③Experiment3isanexampleofhowwaterdissolvessubstancesandobjects.

④Experiment4illustratessomeofthedifferencesbetweensaltwaterandfreshwater.

3.T:Whatotherpropertiesofwaterdoyouknowabout?

Whatcausesthefollowingphenomena?Canyouexplain?

①Wecangetalotofnutrientsbydrinkingwaterandhavingsoup.

②Woodfloatsonwaterwhileironsinks.

③Thecoastalareasareoftenneithertoohotnortoocold.

④Whycansomelivingthingsliveatthebottomoftheoceanwherethereisnosunshine?

(Ifthesequestionsaretoodifficult)Tryaskingquestionsaboutthepropertiesofwaterandthengiveanswerstothem.

Step4:Pre-reading

Lookatthetitlesinthetextbelow.Donotreadthewholetext.Pickoutthesubjectofeachparagraph.Usethestructuresbelowtomakesixquestionsrelatedtothesubjects.

Whatis/are________?

Whatdoes_________looklike?

Whataredifferentpartsof______?

Whatcan________becomparedto?

Howdoes_______work?

Whataresomeexamplesof________?

1.Skimtofindthewordsandphraseswhichdescribethepropertiesofwaterinthereadingtext.

2.ScantoFindoutsomebasicfactsaboutlifeintheoceans.

Lifeonearthbeganintheoceansaboutthreebillionyearsago;

99%ofthelivingspaceonearthisintheoceans;

Thereareaboutfivemillion(known)speciesintheoceans;

Lifeintheoceansrangesfromtinyplanktontogiantwhales.

Step5:Homework

1．Readthetextcarefullyandfindoutthedetailedinformationaboutwaterproperties.

2．Thinkasmanyexamplesaspossibletoillustratewaterproperties.

Period2Reading(Ⅱ)

Teachingsteps:

I.Revision

T:Yesterdayyouwererequiredtoaskmorequestionsaboutwater’spropertiesandfindoutthedetailedinformationaboutwaterpropertiesaswell.Sonowlet’shavealittlequizaboutthepropertiesofwater.

Trueoffalsequestions:

1)Waterisaliquidatroomtemperature,andithasarelativelyhighfreezingpoint.

2)Thereasonwhywatercandissolvemostsubstancesonearthisthatwaterhashighheatcapacity.

3)Likealltheothersubstances,watergetssmaller(contract)whenitfreezes.

4)Purewaterhasahigherfreezingpointandlighterthansaltwater.

5)Thesalinityoftheearth’soceansisabout3.5%.

6)Whenwaterfreezes,itsdensityincreases.

7)Otherrecoursessuchasoil,gas,goldetcisaspreciousasadropofrain.

(TFFTTFF)

II.While-reading

1.Asweallknow,CharlesDarwinisfamousforhis“TheOriginofSpecies”.(Accordingtohistheoryofevolution)

Qs:1)Wasthereanylifeontheearthbillionsofyearsago?

2)Ifany,whatwastheoriginallifelikeatthattime?

3)Wherediditlive?－Inthedeepblueseas.

4)Howdoestheworldtakeitsshape,whichisquitedifferentfromwhatitusedtobe,especiallythosevariousorganisms?－Billionsofyears’naturalselection.

2．Itissaidthat99%ofthelivingspaceonearthisintheoceans.

Qs:1)Whatdoesthisfactresultin?－Marinelifeisincrediblyrichandvaried.

2)Canyougivesomespecificnumbersorexamples?

－Thereareaboutfivemillionspeciesintheoceans.Theyrangefromthetiniestplantsallthewayuptogiants(e.g.sharksandwhales).

3)Whatdoesthisfactimply?Doyouagree?

－Waterisanexcellentmediumforlife.

4)Whydoyouagreethatwaterisanexcellentmediumforlife?(Basedoncommonknowledge)

Waterisaliquidatroomtemperatureandhasarelativelyhighfreezingpoint;

Alllivingcreaturesneedfoodtosurvive,butonmanyoccasionsthenutrientsbecomeavailabletolivingthingsonlywhentheyaredissolvedbywater.

3．Soweknowthatoneofwater’spropertiesisitsdissolvability(溶解性).

Qs:1)Doyouknowwhatgiveswatersuchauniqueproperty?

－Thechemicalstructureofwater.

2)Whatdoesthewatermoleculelooklike?

－Awatermoleculeconsistsoftwohydrogenatomsandoneoxygenatom.Thetwohydrogenatomsarebondedtooneoxygenatomtoforma'V'shape.Thetwohydrogenatomsformapolarmolecule,thatis,onewithaslightlypositiveendandonewithaslightlynegativeend.

3)Canyougivesomeotherexampleswhicharealsoresultedfromwater’suniquechemicalstructure?

－Plantscanpullwateruptheirrootsviaacapillary(毛細(xì)管)process;

－Wecangetalotofnutrientsbydrinkingsoup.

That’swater’sanotherproperty－dissolvability.

4.Sincewaterissuchauniversalsolvent,itcandissolvejustaboutanythingincludingmanygasesandsolids.Asaresult,thereisseawater.

Qs:1)Doyouknowthesalinityoftheearth’soceans?－about3.5%.

2)Whatdoesitmean?

3)Haveyouevernoticedsuchaphenomenonthatinwinterwaterinsomecontainersorsmallriversoftenfreezeswhilethatinseasnot?Canyouexplainit?

－Thesalinityofseawatercanaffectthefreezingpointofwater.Seawaterhasalowerafreezingpoint,soevenwhenthetemperatureofseawaterfallsbelow0℃,seawaterisstillliquid.

5.However,nomatterwhetheritisseawaterorpurewater,“woodfloatsonwaterwhileironsinks”alwaysworks.Howdoyouexplainthat?Whatpropertyofwateristhis?

－Ifasubstancehasalowerdensitythanwaterdoes,itwillfloatonwater;Otherwise,itwillsink.

Qs:1)Whatisdensity?Andwhat’sthedensityofpurewater?

－Densityistherelationshipbetweenmassandvolumeandismeasuredinkilospercubicmeter(kg/m3).Thedensityofwateris1,000kg/m3.

2)DoesitalsogoforthephenomenonthatIcelookslargerthanwaterofequalmass?

－Yes.Water’sdensitydecreaseswhenitturnstoice,soitsvolumeincreases.

3)Doesallthewaterinthesameriveroroceanhaveequaldensity?Tellyourreasons.

-No.Changesinsalinityandtemperatureaffectwater’sdensity.Coldwaterofhighsalinityusuallyismostdenseandwilltendtosinktothebottomoftheocean.

6.Qs:1)Whatdodifferentdensitiesintheoceanresultin?

－Densewatersinksandlessdensewaterispushedtothesurface.Thuswaterintheoceanisalwaysmoving.

2)Whatphenomenacanthisresulthelpusexplain?Pleasegiveexamples.(Ifnecessary,givestudentssomehintssuchasshowingapictureetc.)

Oceanmotionhelpsmovenutrientsaroundandaddsenergytothemarineecosystems.

Differentmarinecreaturesliveindifferentlevelsoftheocean.(Becauseofthefoodstheyneed,sunshineetc.)

7.Readfollowingstatementandthinkwhatconclusionyoucandraw?Orwhatpropertydoesitreferto?

Itissaidthatamanof60kglosesabout1Lwaterthroughbreathandskinevaporation(皮膚蒸發(fā))everyday.Inotherwords,539kcalheatisreleasedinthesetwoways.Ifsomuchheatwerekeptinhumanbody,itwouldraisebodytemperatureby9℃.Canyouimaginetheresult?

－Waterhasarelativelyhighheatcapacityandcanaccommodatetheclimateautomatically.Itcanabsorbandreleasealotofheatwithoutbigchangesinitstemperature,thuscreatingastableenvironment.

8.Herearesomemorefamiliarphenomena.

Whatpropertyofwateriseachofthemrelatedto?

Thecoastalareasareoftenneithertoohotnortoocold.(Water’shighheatcapacity)

Icefloatsonwater.(Density)

Whentheseawaterinacontainerisevaporated(蒸發(fā)),therewillbesomesaltleft.(Dissolvability)

Irrigateinwintercanhelpraisethesoiltemperature.(Water’shighheatcapacity)

PeopleswimmingintheDeadSeafloat;theycanevenreadapaperwhilelyingontheirbackinthewater.(salinityanddensity)

IV.Homework

1.Trytothinkasmanyexamplesaspossibletoshowthatwaterismadeuseoftobringbenefittohumanbeings.

Period3Post-readingListening

Teachinggoals:

1.Togetstudentshaveabetterunderstandingofwater.

2.Tolearnsomenewwordsandsentencestructures.

Teachingprocedures:

PartonePost-reading

I.Betterunderstandthepropertiesofwater

1.“Wherethereiswater,thereislife!”Canyouusesomefactstoillustrateit?

－Waterisamediumforlife.

Sofarasweknow,lifeonlyexistsonearth,becausethereiswater.Etc.

2.Ourplanetisawaterplanetofwhichtwothirdsofitssurfaceiscoveredbywater.What’smore,ourbodyisalsomainlycomposedofwater.Doyouknowfollowingfigureswhichshowhowmuchwaterthereisinpartsofourbody?60%,70%,82%,90%

Upto_____ofthehumanbodyiswater.

______ofthebrainiscomposedofwater.

______bloodismadeupofwater.

Thelungsarenearly_____water.

3.Wateristhesourceoflife.That’swhywaterisanexcellentmediumforlife.Andyouknowallthisisbecauseofwater’suniqueproperties.

II.Revisiononthepropertiesofwater

1.Whatarethepropertiesofwater?

Waterispolar.

Waterisliquidatroomtemperature.

Waterhasarelativelyhighfreezingpoint.

Waterhasdensity1,000kg/m3.

Waterhashighheatcapacity.

…

2.Whatcauseswatertohavesuchuniqueproperties?

－It’smoleculeform/chemicalstructure.

3.Whatiswatermoleculelike?

Chemicalstructure:twohydrogenatomsandoneoxygenatom.

Differentpartsofit:aslightlypositiveendandaslightlynegativeend,soitispolar.

Thefunctionofit:itcauseswatertobeabletodissolvebothsolidsandgases,andthat’swhywatercanbreakdownnutrientsquickly.

4.Dopurewaterandsaltwaterhavethesamechemicalstructure?Doespurewaterhavesalinity?

Qs:1)What’ssalinity?

2)Whatissea/saltwater?－Amixtureofpurewater,dissolvedgasesandsolids.

3)Howdoessalinityaffectwater?

4)Howdoesitaffectwater’sweightandfreezingpoint?

－Thehighersalinitywaterhas,theheavierthewateris.

Thehighersalinityis,thelowerthefreezingpointofwateris.

5.Salinityalsohassomethingtodowiththedensityofwater.Thehighersalinityis,thehigherdensityofwateris.

Qs:1)Whatisdensity?

2)Howisdensitymeasured?

3)Whichisdenser,wateroroil?

4)Whatwillhappenwhenwaterandoilareinthesamecontainer?Whatdoesthisphenomenonillustrate?

－Oilfloatsonwater.Alessdensesubstancefloatsonadensersubstance.

5)Doeswaterinthesameoceanhavethesamedensity?

－No.Denserwatersinksandpusheslessdensewatertothesurface.

6.That’swhytheoceanwaterwillneverstopmoving.Oceanmotion

Qs:1)Whatdoesoceanmotionmean?

2)Howdoesoceanmotionwork?

－Denserwatersinksandpusheslessdensewatertothesurface.

Oceanmotionhelpsmovenutrientsaroundandaddsenergytothemarineecosystems.

3)Whatcausesoceanmotion?

－Changesinsalinityandtemperature.

7.Thetemperatureoftheoceanwateralwayskeepssteady,makingtheoceanasafeandcomfortablehabitat.Doyouknowwhy?

－Waterhasarelativelyhighheatcapacity.

Qs:1)Whatisheatcapacity?

2)What’sthefunctionofheatcapacity?

－Itdetermineshowasubstanceabsorbsandreleasesheat;

Itkeepswatertemperaturesteady;

Itkeepstheearth’stemperaturesteady.

III.Reflection

1.Thereisacloserelationshipbetweensomepropertiesofwater,forexample,salinity,densityandoceanmotion.Howdotheyaffecteachother?

2.Supposeyouareoneofthemainpropertiesofwater(resolvability,salinity,density…).Youthinkyouarethemostimportantandhavethegreatesteffectonlife.Trytopersuadeothersbydescribing:1)Whatyouare.

2)Whataffectsyou.

3)Whatyouaremadethemostofbyhumanbeings.

ParttwoListening

I.Pre-listening

GiveaverybriefintroductionofTheRimeoftheAncientMarineranditsauthorSamuelTaylorColeridge.Hererimeisthevariantofrhyme.

II.While-listening

1.Listentothestory(Part1)andfindtheinformationaboutit.(When,where,who,what?)

When:18thcentury?(No,notmentioned)

Where:onaship

Who:sailors/mariners

What:Oneofthesailorskillsabirdthatbringsgoodlucktotheship,bydoingwhichhehasbroughtbadluckanddeathtothesailors.

2.Listentopart1forthesecondtimeandfinishthefollowingtrueorfalsequestions.

1)ThispoemwaswrittenbyaBritishpoetSamuelTaylorColeridgeinthe1700s.

2)Inthepoem,oneofthesailorskillsafishundertheship.

3)Itisbelievedthattheanimalhekillsisonethatbringsgoodlucktotheship.

4)Othersailorsaresofrightenedandangrythattheykillthesailor.

5)Thesailorsareextremelythirstybuttheycan’tdrinkthewaterinthesea,becauseitistoodirty.

(Keys:TFTFF)

3.Listentopart1forthethirdtimeandanswerthefollowingquestions:

1)Whotellsthestoryinthepoem?

2)Whatdoesoneofthesailorsdo?

3)Whatdoyouthinkwillhappennext?

4)Whyaretheothersailorsfrightened?

4.Listentopart2andcompletethefollowingsentences.

1)Finallytheydecidethathemustdie－_______themarinerwho_______thebird.

2)Hemust____________itallandwill______byhavingtotellthestory…

3)___________ontheship,_________ontheocean,themarinersuffersfrom__________and______.

4)Hisstory_____,the________marinersays_________andasksthemtolearnfromhis___________.

Keys:1)except,shot;2)livethrough,pay3)Leftalone,drifting,loneliness,fear;4)told,ancient,farewell,sufferings

5.Listentopart2againandanswerthefollowingquestions:

1)Whathappenstothesailors?

2)Whathappenstothemariner?

3)Whyisthepersontellingthestory?

4)Whoisthepersonactually?

II.While-listening

1.Reflection:Whatdoyoulearnfromthisstory?

－Everythingexistingintheworldhastheirowncertainvalues,weshouldunderstandandrespectthem.

2.Creation

Workwithpartnerandtrytocomeupwithagood,scarystoryliketheoneaboutthemariner.

Homework

1.PreviewIntegratingSkills“Nature’sNursery:Estuaries”onpage22

Period4IntegratingSkills

Teachinggoals:

1.Togetstudentstoknowwhatestuariesareandtheirfunctions

2.Tolearntowriteanexplanationparagraph

Teachingprocedures:

I.Lead-in

LookatthemapofChina,answerthesequestions:

1.Canyounamethethreecitiesmarkedonthemap?Wherearethey?(Chongqing,Shanghai,Dalian)I

2.Howmuchdoyouknowaboutthem?Istheeconomytherewell-developedornot?

3.Whichcityisthemostdeveloped?Why?

Nowlet’slookatthismapandthenanswerthefollowingquestions:

1.Canyoutellwhatmapitis?Whereisit?

2.Isthewaterheresaltyorfresh?

3.What’stheplacecalledwhereriverandtheoceanmeet?

II.While-reading

1.Skimming

1)Findoutthedefinitionofestuary.

(Anestuaryisthebodyofwaterwherearivermeetstheocean.Saltwaterfromtheoceanandfreshwaterfromtherivermixtogetherinanestuary.Thismixingoffreshandsaltwatercreatesauniqueenvironmentfilledwithlifeofallkindsazonebetweenthelandandsea.)

2)Whatfunctionsofestuarieshavebeenmentionedinthepassage?

(Greatplacesfornature’syounganimalscleanourwaterbyabsorbingnutrientsandpollutantsfromwatercomingfrominlandsources;providebothrecreationandeducationforhumanbeings.)

3)Discussion.

Whatlivingconditionsdoyouthinkareneededfornature’syoungones?

Doestuarieshavesuchconditionsforthem?

2.Discussion

Whatlivingconditionsdoyouthinkareneededfornature’syoungones?

Doestuarieshavesuchconditionsforthem?

3.Scanthepassageandanswerthefollowingquestions.

Whyareestuariessuchgoodplacesfornature’syoungones?

Whatdoes“density”meaninthispassage?

Howdoestuariesaffectthewaterthatpassesthroughthem?

Whyareestuariesmoresensitivetopollutionthanotherareas?

Whyareestuariesimportanttohumanbeings?

(Answertoquestion1)Inestuaries,animalscanenjoyallthebenefitsoftheoceanswithouthavingtofacemanyofitsdangers.Tidesprovideenergyfortheecosystems,butestuariesareprotectedfromwavesandstormsbyislands,mudorsand.Nutrientsfromboththelandandtheoceanarriveinestuaries.

(Answertoquestion2)Itmeansthedegreetowhichanareaisfilledwiththingsorpeople.

(Answertoquestion3)Theyabsorbnutrientsandpollutantsfromwatercominginlandsources,thuscleaningourwater.

(Answertoquestion4)Becauseestuariesactasfilters(過濾器),manypollutantsendupinthem.

(Answertoquestion5)Estuariesprovidebothrecreationandeducationforhumanbeings.Forexample,peoplecanfish,swimandhavefunonthebeach;scientistsandstudentshaveendlessopportunitiestostudyavarietyoflifeinthehabitat.Estuariesalsocontributetotheeconomythroughtourismandfishing.

4.Finishthefollowingpassagewithwordsfromthetext.

Estuariesarebodiesofwateralongcoaststhatare________(形成)whenfreshwaterfromrivers________withsaltwaterfromtheocean.Inestuaries,thefreshriverwaterisblockedfromstreamingintotheopenoceanbyeithersurroundingmainland,orislands.Thismixingoffreshandsaltwater_______auniqueenvironment______withlifeofallkinds--azonebetweenthelandandseaknownasanestuary.Theestuarygathersandholdsa______oflife--givingnutrientsfromthelandandfromtheocean,forminganecosystemthatcontainsmorecreaturesthananyother________ontheearth.Estuariesarealsoimportantforhumanbeings.Theyprotectwaterqualityby________pollutantsfromwatercomingfrominlandsources.Theyarecentersfor_______(娛樂)andeducation.Estuaries,inshort,aretreasures.

(formed,mixes,creates,filled,variety,habitat,absorbing,entertainment)

III.Post-readingDiscussion

Aswelearnfromthispassage,manycitieswhicharebuiltaroundestuaries,likeShanghai,Guangzhou,Ningbo,Shenzhenareverydeveloped.Canyouexplainwhy?

(TheyarenearYangtzeRiverDelta,PearlRiverDelta…)

(Convenienttransportation,richresources…)

IV.Writing

Doyoustillrememberwhatwelearnaboutthepropertiesofwater?Inthatpassage,thewriterintroducesthechemicalstructureandseveralpropertiesofwatertous,suchassalinity,density,heatcapacity.Sofromthisweknowwhenweareexplainingwhatsomethingisorhowthingshappen,itisimportantthatourexplanationsshouldbewellorganizedandeasytounderstand.

Tipone

Ifwearedescribingaprocess，we’dbetterexplaineachstepintheorderithappens.Tellthereadersaboutthecausesandeffectsandusewordslikefirst,second,then,etctoshowtheorderofthesteps.

First…

Second…

Third/Then…

Last…

Tiptwo

Ifwearewritingaboutsomethingthathasseveralparts,weshoulddescribeeachpartandexplainitsfunctionandstructure.

Thefollowingquestionsmayhelp:

Whatisit?Howmanypartsisitmadeupof?

What’sthestructureofeachpart?Howdoesitwork?

Homework

Imaginethatyourscienceteacheraskyoutoexplainoneofthefollowingquestions:

Whydoesanicecubefloat?

Whatwillhappentoapieceofmetalifyouputitinwater?

Whydosomanyspeciesliveinestuaries?

Whyhavesomanycitiesbeenbuiltbyestuaries?

Chooseoneofthequestionsandwriteapassage,usingwhatyouknowaboutnatureandscienceandwhatyouhavelearnedfromthisunit.

Period5Speaking

Teachingaim:

1.Getstudentstotalkaboutthemainuseofwaterinourlifeandtheireffects.

2.Drawstudents’attentiontotheimportanceofusing,savingandprotectingourwateraswell.

Teachingprocedures:

I.Revision

1)Canyouuseyourownwordstotellusthegeneralideaofthetworeadingpassages?

2)Whatdoyoulearnfromourpreviousclasses?

－Waterisnecessary/amusttolife.Withoutwater,life,asweallknow,wouldnotexist.

II.Speaking

1.Pre-speaking

1)Doyouagreewiththesaying“Withoutwater,lifewouldnotexist.”?

2)SonotonlyyouandIagreewiththisopinion,butalsotheUnitedNationsholdthesameview.Andthat’swhywehaveWorldWaterDay.

Q:Isthereanyonewhoknowswhenitis?－Mar.22

3)BriefbackgroundinformationaboutWorldWaterDay:WorldDayforWaterisestablishedbytheUnitedNationsGeneralAssembly'sresolution47/193of22December1992.Itisauniqueoccasiontoremindeverybodythatconcreteeffortstoprovidecleandrinkingwaterandincreaseawarenessworld-wideoftheproblemsandofthesolutions,canhelpmakethedifference.

4)Lastyearwewitnessedsomegreatdisasterssuchasthetyphoon“Yunna”andthetsunamiintheIndiaOcean.WhatacoincidencethatthethemeforWorldWaterDay2023was“WaterandDisaster”.WorldWaterDay2023willbeguidedbytheupcomingwaterdecade'stheme"WaterforLife".ItwillbethestartingdayforthisInternationalDecadeforAction,"WaterforLife".

2.While-speaking

1)Tosomeextent,theexistenceofWorldWaterDayalsoimpliesthathumanbeingscannotlivewithoutwater.Why?Canyoutellhowwaterisbeingusedinourlife?Givesomeexamples.

－electricity,agriculture,homeuse,industry,transport,entertainment,etc.

2)Lookatthefirstpicture(“electricity”)inthetextbookandtalkaboutit.

Thewaterisbeingusedtogenerateelectricity.Buildingupbehindahighdam,wateraccumulatespotentialenergy(勢能).Thisistransformedintomechanicalenergywhenthewaterrushesdown.Itisagoodwaytousewaterbecausewaterisrenewablegreenenergy.Itwillneverrunoutifonlyweuseitproperlyandgeneratingelectricitybyusingwaterisabetterwaytoprotecttheenvironmentthanothers.However,ittakesagreatsumofmoneyandalongperiodoftimetobuildadamandpreparealltherequiredequipment.Sincenowadayselectricityhasalreadybeenanindispensablepartofourlife,mostpeoplebenefitfromusingwaterinthisway.

3)Groupwork.Dividestudentsintoseveralgroupswithsixineach.Eachonetakeschargeofonepicture.Whendiscussingeachpicture,pleasethinkaboutthefollowingquestions:

Howiswaterbeingused?

Whatpropertyofwaterenablesittobeusedi