说课unit13 Senior2.ppt

Welcome Theearthisawaterplanet Unit13TheWaterPlanet Wherethereiswater thereislife properties Whatpropertiesorcharacteristicsdoyouknowaboutwater colorless tasteless odorless threeforms feelingwet absorbingheat dissolving FastReading THEPROPERTIESOFWATER CHEMICALSTRUCTURE SALINITY DENSITY HEATCAPACITY OCEANMOTION Skimming Findout waterproperties Waterisaliquidatroomtemperature andithasarelativelyhighfreezingpoint Thereasonwhywatercandissolvemostsubstancesonearthisthatwaterhashighheatcapacity Likealltheothersubstances watergetssmaller contract缩小 whenitfreezes Purewaterhasahigherfreezingpointandlighterthansaltwater Thesalinityoftheearth soceansisabout3 5 Whenwaterfreezes itsdensityincreases Otherrecoursessuchasoil gas goldetcisaspreciousasadropofrain Quiz TrueorFalse CarefulReading Paragraph1 Whatmakestheoceansuchagreatplacetolive A airB sunshineC waterD wind Normalstateofwater solidliquidgas negativeend positiveend polar Paragraph2 H2O 2 1 1 HydrogenAtoms OxygenAtom H2OMolecule salinityofseawater 35 35 Paragraph3 seawater saltwater salinityofseawateraffects and dissolvedgases dissolvedsolids purewater weight freezingpoint Paragraph4 Factorsofdensity and Unitofdensity Densityofpurewater mass volume kg m3 kilogramspercubicmeter 1 000kg m3 onecubicmeterofwaterweighsonethousandkilograms Oppositeword phraseofabsorb giveoffchangecreate Heatcapacity watertemperaturesubstanceenergy Paragraph5 Paragraph6 Howdoesthewaterintheoceanmove Paragraph7 Mainidea significanceofwatertonature Densewatersinksandlessdensewaterispushedtothesurface Salinity Density Oceanmotion What stherelationshipbetweeneachtwoofthem 1 Lifeintheoceansrangesfromthetiniestplanktonallthewayuptogiantslikesharksandwhales Languagepoints rangefromAtoB varyfromAtoB 价格自五美元至十美元不等 Pricesrangedfrom5dollarsto10dollars 2 Waterisquitesimple butthewaythewaterisformedgiveswateritsuniqueproperties that inwhich 水是非常简单的 但水分子的结构方式却赋予水以独特的性质 Correction 1 Idon tlikethewayinthatyouspeaktome 2 Thewayinwhichyougivemeisbetter 3 Thewayyouthoughtofsolvetheproblemwasreasonable to 3 Thenutrientsinwhateverfallsintotheoceanquicklybecameavailable anythingthat thatcanbeusedorobtained Whateverhappens keepontrying nomatterwhat It sgenerallyconsideredunwisetogiveachild heorshewants A howeverB whateverC whicheverD whenever 4 Densityismeasuredinkilogrammespercubicmetre 以 计算 用 测量 Therivermeasures150feetwide Aclockisusedtomeasuretime Aperson ssuccesscan tbemeasuredintermsofmoney We llmakeanewsuittoyourownmeasure Thewaterissopollutedthatweshouldtakemeasurestomakeitclean vi 有 长 宽 高 体积 容量等 vt 测量 vt 衡量 考虑 n 尺寸 make toone sownmeasure n 措施 Usefulexpressions thatis thatistosaybemadeupof consistof becomposedofbreakdown in into awayfrom out uptakeadvantageof makeuseofsomethingproperlybesensitiveto affectedeasilybysomethingdependon relyon MultipleChoice 1 howhardIpushed thedoorstayedclosed A EvenifB SinceC ThoughD Nomatter2 Don tyoubelieveme Ibelieve yousay A No whateverB Yes nomatterwhatC No nomatterwhatD Yes whatever3 Theworldis sevencontinentsandfouroceans A madeupofB madeoutofC madefromD madein4 Iamsorrytoarrivelatebutthecar ontheway A brokedownB brokeupC brokeoffD brokeout 4 ItistheSuezCanal separatesAsia Africa A which toB that fromC fromD where was5 Whodoyouthinkisthegreatwriter A livelyB aliveC liveD living6 TheOlympicGames in776B C didn tincludedwomenplayersuntil1912 A firstplayingB tobefirstplayedC firstplayedD tobefirstplaying7 Thesuitcase 15poundand 2metreslongand1metrewide C weighty measuredA isweighed ismeasuredB weighs measures WriteanarticleaboutRIVERPOLLUTEDaccordingtothematerialsgivenbelow Homework RIVERPOLLUTEDNumerousdeadfishcanbefoundfloatingonthesurfaceoftheHaiheRiver thesymbolofTianjincity becauseofseriouspollutionthissummer Inareport TianjinEveningNewscalledonresidentstohelpprotect