Unit13reading课件
日期：2010-11-14 11:59
ThepropertiesofwaterStep1Lead-inTodaywe’lllearn“thepropertiesofwater”Canyouguesswhatwillbediscussedinthefollowingtextaccordingtothetitle?(2)Nowlet’shaveatesttoseehowmuchdoyouknowaboutwaterwaterseasoceansaircloudrainiceplantsanimalssoilliquidsteamvaporriverslakescropsGuidingquestions(1)Wherecanwefindwater?(2)Inwhatformscanwaterexist?(3)Whatneedswater?3Whatusescanyouthinkofmakingofwater?Step2Readingandanswerthefollowingquestions1Whatwordscanyouusetodescribemarinelife?2Whatmakeswaterdifferentfromeverythingelseonearth?3Whatthingswillfloatonwater?4Whatmakesnutrientsmovearoundinoceanswaters?Step3MatchthefactswithpropertopicsChemicalstructureAmetalspoonsinksintoaglassofwaterSalinityWeputabottleofhotwaterunderthequiltinwinteranditwillkeepsuswarmDensityIfsomeoilgoesintotheseabymistake,
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