unit 13 the water planet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1/22UNIT13THEWATERPLANET教案MUNIT13THEWATERPLANETPERIOD1READINGTEACHINGGOALS1TOGETTHESSTOUNDERSTANDTHEMAINPROPERTIESOFWATERBYCONNECTINGTHEMWITHSOMECOMMONPHENOMENAANDLEARNINGTOEXPLAINTHEPHENOMENA2TOENABLETHEMTOBEAWAREOFTHEIMPORTANCEOFWATER,MAKINGGOODUSEOFWATERINAPROPERWAYANDPROTECTINGWATERRESOURCESTEACHINGSTEPSSTEP1LEADINREADASHORTPOEMANDGUESSITSNAMEALETTERFROM_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2/22SURELY,ALLFORMSOFLIFEWILLWITHERAWAYHAVEYOUEVERIMAGINED,LIFEWITHOUTMEITELLYOU,ITWILLBEUNBEARABLETHINKTWICEFOREVERYDROPCOUNTSQS1WHATDOES“DEARUSER”HEREREFERTO2WHATDOESITTALKTOITSUSERS3ONWHICHPLANETDOESITEXISTONTHEEARTH,WHICHISALSOCALLEDTHEWATERPLANET4DOYOUKNOWWHYITISCALLED“THEWATERPLANET”BECAUSEABOUTTHREEQUARTERSOFTHEEARTHISCOVEREDBYWATERSTEP2PREREADINGLOOKATTHETITLESINTHETEXTBELOWDONOTREADTHEWHOLETEXTPICKOUTTHESUBJECTOFEACHPARAGRAPHUSETHESTRUCTURESBELOWTOMAKESIXQUESTIONSRELATEDTOTHESUBJECTSP19STEP3WHILEREADING1SKIMTOFINDBASICFACTSABOUTLIFEINTHEOCEANSFROMTHEOPENINGPARAGRAPHLIFEONEARTHBEGANINTHEOCEANSABOUTTHREEBILLIONYEARSAG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3/22O99OFTHELIVINGSPACEONEARTHISINTHEOCEANSTHEREAREABOUTFIVEMILLIONKNOWNSPECIESINTHEOCEANSLIFEINTHEOCEANSRANGESFROMTINYPLANKTONTOGIANTWHALES2QUIZTRUEORFALSEQUESTIONS1）WATERISALIQUIDATROOMTEMPERATURE,ANDITHASARELATIVELYHIGHFREEZINGPOINT2）THEREASONWHYWATERCANDISSOLVEMOSTSUBSTANCESONEARTHISTHATWATERHASHIGHHEATCAPACITY3）LIKEALLTHEOTHERSUBSTANCES,WATERGETSSMALLERCONTRACT缩小WHENITFREEZES4PUREWATERHASAHIGHERFREEZINGPOINTANDLIGHTERTHANSALTWATER5THESALINITYOFTHEEARTHSOCEANSISABOUT356WHENWATERFREEZES,ITSDENSITYINCREASES7OTHERRECOURSESSUCHASOIL,GAS,GOLDETCISASPRECIOUSASADROPOFRAIN8THEREAREABOUTFIVEBILLIONSPECIESINTHEOCEANSRANGINGFROMTHETINIESTPLANKTONTOGIANTSLIKESHARKSANDWHALES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4/22BILLIONMILLION9THEWATERMOLECULEISMADEOFTWOHYDROGENATOMSANDONEOXYGENATOM10PUREWATERHASAHIGHERFREEZINGPOINTANDISLIGHTERTHANSALTWATERMADEOFMADEUPOF11IFASUBSTANCEHASADENSITY888KG/M3,ITWILLFLOATONWATER12THEHEATCAPACITYISRELATIVELYHIGH,SOTHATMOSTANIMALSDONTLIKELIVINGINITTEMPERATURESTABLELIKE13THEMOSTIMPORTANTTHINGWECANLEARNABOUTWATER,ISTHATWEMUSTPROTECTITANDUSEITWISELYTFFFFTTFFTTFT3MULTIPLECHOICESA1BASEDONPARAI,THEAUTHORTELLSUSTHATTHEREAREVARIOUSSPECIESINTHEOCEANS,INDICATINGTHAT_AWATERPLAYSAGREATROLEFORMARINELIFEBOCEANISAGOODPLACEFORLIFECTHEREAREMANYREASONSFORTINIESTPLANKTONANDGIANTSLIKESHARKSANDWHALESDOCEANISPARTOFTHEEARTHC2THEWATERINTHEOCEANISALWAYSMOVINGINTHAT_ATHETEMPERATUREOFSEAWATERISRELATIVELYHIGHBWATERSDENSITYAFFECTCHANGESINSALINITYANDTEMPERATURE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5/22CCHANGESINSALINITYANDTEMPERATUREHAVEEFFECTONWATERSDENSITYDWATERSINRIVERSALWAYSFLOWINTOTHEOCEAND3GENERALLYSPEAKING,HUMANBEINGSARE_TOLARGEORSUDDENLYCHANGESINTEMPERATUREAGENEROUSBOBJECTIVECSUBJECTIVEDSENSITIVE4CANYOUANSWERTHEFOLLOWINGQUESTIONS1WHATISTHEIMPORTANCEOFTHECHEMICALSTRUCTUREOFWATERTHECHEMICALSTRUCTUREOFWATERMAKESITANEXCELLENTMEDIUMFORLIFEANDALSOMAKESITDIFFERENTFROMALMOSTEVERYTHINGELSEONEARTH2WHATISTHESALINITYOFTHEEARTHSOCEANSTHESALINITYOFTHEEARTHSOCEANSISABOUTTHIRTYFIVEPARTSPERTHOUSAND,MEANIGTHATTHEREAREABOUT35GRAMMESOFDISSOLVEDSOLIDSANDGASESINONEKILOGRAMMEOFWATER3HOWABOUTDENSITYANDHEATCAPACITYDENSITYISTHERELATIONSHIPBETWEENMASSANDVOLUME,MEASUREDINKILOGRAMMESPERCUBICMETREHEATCAPACITYTHEAMOUNTOFENERGYITTAKESTORAISETHETEMPERATUREOFASUBSTANCEBYONEDEGREECENTIGRADE5FURTHERUNDERSTANDINGBYLOOKINGATSOMEPICTURES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6/22READFOLLOWINGSTATEMENTANDTHINKWHATCONCLUSIONYOUCANDRAWORWHATPROPERTYDOESITREFERTOITISSAIDTHATAMANOF60KGLOSESABOUT1LWATERTHROUGHBREATHANDSKINEVAPORATION皮肤蒸发EVERYDAYINOTHERWORDS,539KCALHEATISRELEASEDINTHESETWOWAYSIFSOMUCHHEATWEREKEPTINHUMANBODY,ITWOULDRAISEBODYTEMPERATUREBY9CANYOUIMAGINETHERESULTWATERHASARELATIVELYHIGHHEATCAPACITYANDCANACCOMMODATETHECLIMATEAUTOMATICALLYITCANABSORBANDRELEASEALOTOFHEATWITHOUTBIGCHANGESINITSTEMPERATURE,THUSCREATINGASTABLEENVIRONMENTHEREARESOMEMOREFAMILIARPHENOMENA,WHATPROPERTYOFWATERARETHEYRELATEDTOTHECOASTALAREASAREOFTENNEITHERTOOHOTNORTOOCOLDICEFLOATSONWATERWHENTHESEAWATERINACONTAINERISEVAPORATED蒸发,THEREWILLBESOMESALTLEFTIRRIGATEINWINTERCANHELPRAISETHESOILTEMPERATUREPEOPLESWIMMINGINTHEDEADSEAFLOATTHEYCANEVENREADAPAP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7/22ERWHILELYINGONTHEIRBACKINTHEWATERDISCUSSIONINTHEPASSAGEMANYPROPERTIESHAVEBEENTALKEDABOUTARETHEREANYOTHERPROPERTIESYOUTHINKIMPORTANTNOTMENTIONEDHOMEWORKTRYTOTHINKASMANYEXAMPLESASPOSSIBLETOSHOWTHATWATERISMADEUSEOFTOBRINGBENEFITTOHUMANBEINGSPERIOD2POSTREADINGLISTENINGTEACHINGGOALS1TOGETSTUDENTSHAVEABETTERUNDERSTANDINGOFWATER2TOLEARNSOMENEWWORDSANDSENTENCESTRUCTURESTEACHINGPROCEDURESPARTONEPOSTREADINGIBETTERUNDERSTANDTHEPROPERTIESOFWATER1“WHERETHEREISWATER,THEREISLIFE”CANYOUUSESOMEFACTSTOILLUSTRATEITWATERISAMEDIUMFORLIFESOFARASWEKNOW,LIFEONLYEXISTSONEARTH,BECAUSETHEREISWATERETC2OURPLANETISAWATERPLANETOFWHICHTWOTHIRDSOFITSSURFACEISCOVE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