unit13TheWaterPlanet课件
日期：2010-01-28 01:18
UNIT13THEWATERPLANETPERIOD2READINGThepropertiesofwaterStep1Lead-inTodaywe’lllearn“thepropertiesofwater”Canyouguesswhatwillbediscussedinthefollowingtextaccordingtothetitle?(2)Nowlet’shaveatesttoseehowmuchdoyouknowaboutwaterwaterseasoceansaircloudrainiceplantsanimalssoilliquidsteamvaporriverslakescropsGuidingquestions(1)Wherecanwefindwater?(2)Inwhatformscanwaterexist?(3)Whatneedswater?3Whatusescanyouthinkofmakingofwater?Step2Readingandanswerthefollowingquestions1Whatwordscanyouusetodescribemarinelife?2Whatmakeswaterdifferentfromeverythingelseonearth?3Whatthingswillfloatonwater?4Whatmakesnutrientsmovearoundinoceanswaters?Step3MatchthefactswithpropertopicsChemicalstructureAmetalspoonsinksintoaglassofwaterSalinityWeputabottleofhotwaterunderthequiltinwinteranditwillkeepsuswarmDensityIf，
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