the properties of water教案

精品文档2016全新精品资料全新公文范文全程指导写作独家原创1/14THEPROPERTIESOFWATER教案文章来源MUNIT13THEPROPERTIESOFWATERTEACHINGGOALS1TALKABOUTWATERANDTHEOCEAN2PRACTICECOMMUNICATIVESKILLS3REVIEWMODALVERBS4WRITEANEXPLANATIONPARAGRAPHTHEFIRSTPERIODTEACHINGAIMS1LEARNANDMASTERTHENEWWORDSANDTHEUSEFULEXPRESSIONSOFTHISPART2LEARNSOMETHINGABOUTWATERBYDOINGEXPERIMENT3DOSOMELISTENING4IMPROVETHESTUDENTSSPEAKINGABILITYBYTALKINGTEACHINGIMPORTANTPOINTS1MAKETHESTUDENTSBEFREETOTALKABOUTWATER2IMPROVETHESTUDENTSLISTENINGABILITYBYLISTENINGTEACHINGDIFFICULTPOINTS1HOWTOFINISHTHETASKOFSPEAKING2HOWTOIMPROVETHESTUDENTSLISTENINGABILITY精品文档2016全新精品资料全新公文范文全程指导写作独家原创2/14TEACHINGMETHODS1LISTENINGANDANSWERINGACTIVITYTOHELPTHESTUDENTSGOTHROUGHWITHTHELISTENINGMATERIAL2INDIVIDUAL,PAIRORGROUPWORKTOMAKEEVERYSTUDENTWORKINCLASSTEACHINGAIDS1THEMULTIMEDIA2THEBLACKBOARD3ANEMPTYGLASS,ABOTTLEOFWATERANDABOTTLEOFVEGETABLEOILTEACHINGPROCEDURESSTEP1GREETINGSANDLEADINREADASHORTPOEMANDGUESSITSNAMEALETTERFROM_WATERDEARUSER,SHAMETOYOUALL,THEIGNORANT,IAMYOURLIFEBUTYOUSEEMNOTTOVALUEMEGIVEMEALLTHERESPECTFORINMEISETERNALLIFEIFYOUCONTINUEABUSINGME精品文档2016全新精品资料全新公文范文全程指导写作独家原创3/14SURELY,ALLFORMSOFLIFEWILLWITHERAWAYHAVEYOUEVERIMAGINED,LIFEWITHOUTMEITELLYOU,ITWILLBEUNBEARABLETHINKTWICEFOREVERYDROPCOUNTSQS1WHATDOES“DEARUSER”HEREREFERTO2WHATDOESITTALKTOITSUSERS3ONWHICHPLANETDOESITEXISTONTHEEARTH,WHICHISALSOCALLEDTHEWATERPLANET4DOYOUKNOWWHYITISCALLED“THEWATERPLANET”BECAUSEABOUTTHREEQUARTERSOFTHEEARTHISCOVEREDBYWATERSTEP2PAIRWORKCOLLECTASMANYWORDSASPOSSIBLERELATEDTOWATERQSHOWMUCHDOYOUKNOWABOUTWATERISALLWATERFRESHORSALTYSTEP3TALKABOUTTHEPROPERTIESOFWATER精品文档2016全新精品资料全新公文范文全程指导写作独家原创4/141PAIRWORKTWATERISAROUNDUSANDINSIDEUSWECANTGOWITHOUTWATERQSWHYISWATERSOIMPORTANTTOLIVINGTHINGSCANYOUPOINTOUTSOMEOFITSPROPERTIESORCHARACTERISTICSSUGGESTEDVOCABULARYITSCOLORLESS,TASTELESS,ODORLESSANDUNIVERSALDISSOLVENTITFEELSWETITEXISTSINTHREEFORMSLIQUID,SOLID,GAS,ANDISCYCLEDTHROUGHTHEWATERCYCLEITCANABSORBALARGEAMOUNTOFHEATITSTICKSTOGETHERINTOBEADSORDROPSITSPARTOFEVERYLIVINGORGANISMONTHEPLANETETC2GROUPWORKLEARNMOREABOUTWATERSPROPERTIESBYDOINGSOMESIMPLEEXPERIMENTSANDLEARNTODESCRIBEANEXPERIMENTWHATPROPERTYOFWATERDOESEACHOFTHEFOUREXPERIMENTSILLUSTRATEWHATCAUSESTHISPHENOMENONWHATSTHISPHENOMENONRELATEDTOEXPERIMENT1SHOWSHOWAIRPRESSURECAUSESAPIECEOFTHICK精品文档2016全新精品资料全新公文范文全程指导写作独家原创5/14PAPERTOCLINGTOANUPTURNEDGLASSOFWATEREXPERIMENT2ILLUSTRATESHOWSUBSTANCESWITHDIFFERENTDENSITYBEHAVEWHENPLACEDINTHESAMECONTAINEREXPERIMENT3ISANEXAMPLEOFHOWWATERDISSOLVESSUBSTANCESANDOBJECTSEXPERIMENT4ILLUSTRATESSOMEOFTHEDIFFERENCESBETWEENSALTWATERANDFRESHWATER3TWHATOTHERPROPERTIESOFWATERDOYOUKNOWABOUTWHATCAUSESTHEFOLLOWINGPHENOMENACANYOUEXPLAINWECANGETALOTOFNUTRIENTSBYDRINKINGWATERANDHAVINGSOUPWOODFLOATSONWATERWHILEIRONSINKSTHECOASTALAREASAREOFTENNEITHERTOOHOTNORTOOCOLDWHYCANSOMELIVINGTHINGSLIVEATTHEBOTTOMOFTHEOCEANWHERETHEREISNOSUNSHINEIFTHESEQUESTIONSARETOODIFFICULTTRYASKINGQUESTIONSABOUTTHEPROPERTIESOFWATERANDTHENGIVEANSWERSTOTHEMSTEP5HOMEWORK1READTHETEXTCAREFULLYANDFINDOUTTHEDETAILEDINFORMATIONABOUTWATERPROPERTIES2THINKASMANYEXAMPLESASPOSSIBLETOILLUSTRATEWATERPROPERTIES精品文档2016全新精品资料全新公文范文全程指导写作独家原创6/14THESECONDPERIODTEACHINGAIMS1LEARNANDMASTERTHESOMENEWWORDSANDPHRASES2IMPROVETHESTUDENTSREADINGABILITY3ENABLETHESTUDENTSTOREALIZETHATITISIMPORTANTTOPROTECTTHEWATERONOURPLANETTEACHINGIMPORTANTPOINTS1IMPROVETHESTUDENTSREADINGABILITY2MASTERTHEFOLLOWINGPHRASESALLTHEWAY,THATIS,MIXWITH,TAKEADVANTAGEOF,MANAGETODOTEACHINGDIFFICULTPOINTHOWDOWEMAKETHESTUDENTSUNDERSTANDTHEREADINGPASSAGEBETTERTEACHINGMETHODS1DISCUSSIONBEFOREREADINGTOMAKETHESTUDENTSINTERESTEDINWHATTHEYWILLLEARN2FASTREADINGTOGETAGENERALIDEAOFTHETEXT3DISCUSSIONAFTERREADINGTOMAKESTUDENTSUNDERSTANDWHATTHEYVELEARNEDBETTER4CAREFULREADINGTOGETTHEDETAILEDINFORMATIONINTHETEXTTEACHINGAIDS精品文档2016全新精品资料全新公文范文全程指导写作独家原创7/141THEMULTIMEDIA2THEBLACKBOARDTEACHINGPROCEDURESSTEP1GREETINGSSTEP2REVISIONANDLEADINASKSOMEONETOILLUSTRATEWATERPROPERTIESSTEP3PREREADINGLOOKATTHETITLESINTHETEXTBELOWDONOTREADTHEWHOLETEXTPICKOUTTHESUBJECTOFEACHPARAGRAPHUSETHESTRUCTURESBELOWTOMAKESIXQUESTIONSRELATEDTOTHESUBJECTSWHATIS/ARE_WHATDOES_LOOKLIKEWHATAREDIFFERENTPARTSOF_WHATCAN_BECOMPAREDTOHOWDOES_WORKWHATARESOMEEXAMPLESOF_SKIMTOFINDTHEWORDSANDPHRASESWHICHDESCRIBETHEPROPERTIESOFWATERINTHEREADINGTEXTSCANTOFINDOUTSOMEBASICFACTSABOUTLIFEINTHEOCEANSLIFEONEARTHBEGANINTHEOCEANSABOUTTHREEBILLIONYEARSAGO99OFTHELIVINGSPACEONEARTHISINTHEOCEANS精品文档2016全新精品资料全新公文范文全程指导写作独家原创8/14THEREAREABOUTFIVEMILLIONKNOWNSPECIESINTHEOCEANSLIFEINTHEOCEANSRANGESFROMTINYPLANKTONTOGIANTWHALESTYESTERDAYYOUWEREREQUIREDTOASKMOREQUESTIONSABOUTWATERSPROPERTIESANDFINDOUTTHEDETAILEDINFORMATIONABOUTWATERPROPERTIESASWELLSONOWLETSHAVEALITTLEQUIZABOUTTHEPROPERTIESOFWATERTRUEOFFALSEQUESTIONS1WATERISALIQUIDATROOMTEMPERATURE,ANDITHASARELATIVELYHIGHFREEZINGPOINT2THEREASONWHYWATERCANDISSOLVEMOSTSUBSTANCESONEARTHISTHATWATERHASHIGHHEATCAPACITY3LIKEALLTHEOTHERSUBSTANCES,WATERGETSSMALLERCONTRACTWHENITFREEZES4PUREWATERHASAHIGHERFREEZINGPOINTANDLIGHTERTHANSALTWATER5THESALINITYOFTHEEARTHSOCEANSISABOUT356WHENWATERFREEZES,ITSDENSITYINCREASES7OTHERRECOURSESSUCHASOIL,GAS,GOLDETCISASPRECIOUSASADROPOFRAINTFFTTFFSTEP4WHILEREADINGASWEALLKNOW,CHARLESDARWINISFAMOUSFORHIS“THEORIGINO精品文档2016全新精品资料全新公文范文全程指导写作独家原创9/14FSPECIES”ACCORDINGTOHISTHEORYOFEVOLUTIONQS1WASTHEREANYLIFEONTHEEARTHBILLIONSOFYEARSAGO2IFANY,WHATWASTHEORIGINALLIFELIKEATTHATTIME3WHEREDIDITLIVEINTHEDEEPBLUESEAS4HOWDOESTHEWORLDTAKEITSSHAPE,WHICHISQUITEDIFFERENTFROMWHATITUSEDTOBE,ESPECIALLYTHOSEVARIOUSORGANISMSBILLIONSOFYEARSNATURALSELECTION2ITISSAIDTHAT99OFTHELIVINGSPACEONEARTHISINTHEOCEANSQS1WHATDOESTHISFACTRESULTINMARINELIFEISINCREDIBLYRICHANDVARIED2CANYOUGIVESOMESPECIFICNUMBERSOREXAMPLESTHEREAREABOUTFIVEMILLIONSPECIESINTHEOCEANSTHEYRANGEFROMTHETINIESTPLANTSALLTHEWAYUPTOGIANTSEGSHARKSANDWHALES3WHATDOESTHISFACTIMPLYDOYOUAGREEWATERISANEXCELLENTMEDIUMFORLIFE4WHYDOYOUAGREETHATWATERISANEXCELLENTMEDIUMFORLIFEBASEDONCOMMONKNOWLEDGEWATERISALIQUIDATROOMTEMPERATUREANDHASARELATIVELYHIGHFREEZINGPOINT精品文档2016全新精品资料全新公文范文全程指导写作独家原创10/14ALLLIVINGCREATURESNEEDFOODTOSURVIVE,BUTONMANYOCCASIONSTHENUTRIENTSBECOMEAVAILABLETOLIVINGTHINGSONLYWHENTHEYAREDISSOLVEDBYWATER3SOWEKNOWTHATONEOFWATERSPROPERTIESISITSDISSOLVABILITY溶解性QS1DOYOUKNOWWHATGIVESWATERSUCHAUNIQUEPROPERTYTHECHEMICALSTRUCTUREOFWATER2WHATDOESTHEWATERMOLECULELOOKLIKEAWATERMOLECULECONSISTSOFTWOHYDROGENATOMSANDONEOXYGENATOMTHETWOHYDROGENATOMSAREBONDEDTOONEOXYGENATOMTOFORMAVSHAPETHETWOHYDROGENATOMSFORMAPOLARMOLECULE,THATIS,ONEWITHASLIGHTLYPOSITIVEENDANDONEWITHASLIGHTLYNEGATIVEEND3CANYOUGIVESOMEOTHEREXAMPLESWHICHAREALSORESULTEDFROMWATERSUNIQUECHEMICALSTRUCTUREPLANTSCANPULLWATERUPTHEIRROOTSVIAACAPILLARY毛细管PROCESSWECANGETALOTOFNUTRIENTSBYDRINKINGSOUPTHATSWATERSANOTHERPROPERTYDISSOLVABILITY4SINCEWATERISSUCHAUNIVERSALSOLVENT,ITCANDISSOLVEJUSTABOUTANYTHINGINCLUDINGMANYGASESANDSOLIDSASARESULT,THEREISSEAWATER精品文档2016全新精品资料全新公文范文全程指导写作独家原创11/14QS1DOYOUKNOWTHESALINITYOFTHEEARTHSOCEANSABOUT352WHATDOESITMEAN3HAVEYOUEVERNOTICEDSUCHAPHENOMENONTHATINWINTERWATERINSOMECONTAINERSORSMALLRIVERSOFTENFREEZESWHILETHATINSEASNOTCANYOUEXPLAINITTHESALINITYOFSEAWATERCANAFFECTTHEFREEZINGPOINTOFWATERSEAWATERHASALOWERAFREEZINGPOINT,SOEVENWHENTHETEMPERATUREOFSEAWATERFALLSBELOW0,SEAWATERISSTILLLIQUID5HOWEVER,NOMATTERWHETHERITISSEAWATERORPUREWATER,“WOODFLOATSONWATERWHILEIRONSINKS”ALWAYSWORKSHOWDOYOUEXPLAINTHATWHATPROPERTYOFWATERISTHISIFASUBSTANCEHASALOWERDENSITYTHANWATERDOES,ITWILLFLOATONWATEROTHERWISE,ITWILLSINKQS1WHATISDENSITYANDWHATSTHEDENSITYOFPUREWATERDENSITYISTHERELATIONSHIPBETWEENMASSANDVOLUMEANDISMEASUREDINKILOSPERCUBICMETERKG/M3THEDENSITYOFWATERIS1,000KG/M32DOESITALSOGOFORTHEPHENOMENONTHATICELOOKSLARGERTHANWATEROFEQUALMASSYESWATER精品文档2016全新精品资料全新公文范文全程指导写作独家原创12/14SDENSITYDECREASESWHENITTURNSTOICE,SOITSVOLUMEINCREASES3DOESALLTHEWATERINTHESAMERIVEROROCEANHAVEEQUALDENSITYTELLYOURREASONSNOCHANGESINSALINITYANDTEMPERATUREAFFECTWATERSDENSITYCOLDWATEROFHIGHSALINITYUSUALLYISMOSTDENSEANDWILLTENDTOSINKTOTHEBOTTOMOFTHEOCEAN6QS1WHATDODIFFERENTDENSITIESINTHEOCEANRESULTINDENSEWATERSINKSANDLESSDENSEWATERISPUSHEDTOTHESURFACETHUSWATERINTHEOCEANISALWAYSMOVING2WHATPHENOMENACANTHISRESULTHELPUSEXPLAINPLEASEGIVEEXAMPLESIFNECESSARY,GIVESTUDENTSSOMEHINTSSUCHASSHOWINGAPICTUREETCOCEANMOTIONHELPSMOVENUTRIENTSAROUNDANDADDSENERGYTOTHEMARINEECOSYSTEMSDIFFERENTMARINECREATURESLIVEINDIFFERENTLEVELSOFTHEOCEANBECAUSEOFTHEFOODSTHEYNEED,SUNSHINEETC7READFOLLOWINGSTATEMENTANDTHINKWHATCONCLUSIONYOUCANDRAWORWHATPROPERTYDOESITREFERTOITISSAIDTHATAMANOF60KGLOSESABOUT1LWATERTHROUGHBREATHANDSKINEVAPORATION皮肤蒸发精品文档2016全新精品资料全新公文范文全程指导写作独家原创13/14EVERYDAYINOTHERWORDS,539KCALHEATISRELEASEDINTHESETWOWAYSIFSOMUCHHEATWEREKEPTINHUMANBODY,ITWOULDRAISEBODYTEMPERATUREBY9CANYOUIMAGINETHERESULTWATERHASARELATIVELYHIGHHEATCAPACITYANDCANACCOMMODATETHECLIMATEAUTO