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1、Waterboy---wewillrockyouThreeformsofwater-----马平艳WhatdoIalsoneed?++=?Howtogetice?ice(freeze)water/fri:z/icewater(melt)watersteam(boil)steamwater(cooldown)icesteamwater(freezes)(melts)(boils)(coolsdown)Howdotheyturnintoeachother?Theyarethreeformsofwater./
2、fR:m/icefreeze:water---Whenwater_______,itturnsinto_______.---Whathappenswhenwater__________?freezesfreezesice---When_________,itturnsinto_______.---Whathappenswhen__________?melt:icewatericemeltswatericemeltsboil:watersteamturnsintosteam---Whenwater____
3、_,it_________________.---Whathappenswhenwater______?boilsboils---When________________,it_______________.---What___________________________?cooldown:steamwaterhappenswhensteamcoolsdownsteamcoolsdownturnsintowaterLet’shaveacompetition!Use“whenwater……,ittur
4、nsinto…….”S1:Whathappenswhenwater………?S2:When…….,it…….Dopairwork:I’vegotsomequestionsforyoutothinkabout.Whathappenswhenwaterboils?Whathappenswhenwaterfreezes?Whathappenswhenicemelts?Whathappenswhensteamcoolsdown?LookanreadWhenwaterboils,itturnsintosteam.W
5、henwaterfreezes,itturnsintoice.Whenicemelts,itturnsintowater.Whensteamcoolsdown,itturnsintowater.ListenandanswerDomorepracticeStep1:Putadrylidonaglassofhotwater.Step2:Waitfortenseconds.Step3:Takethelidoff.Doanexperiment(A)Doanexperiment(B)stept1:Putsomei
6、cecubesinaglassofwater.Stept2:Waitfortwominutes.Stept3:Lookattheoutsideoftheglass.Thetitleoftheexperiment：Three________ofwaterThedate:_________24th,2012TheaimtofindoutwhatisunderthelidandhowdoesithappenThetheory:whenwaterishotter,itturnsintosteam.WhenSte
7、amcoolsdown,itturnsintowater.Materials:1aglassofhotwater2adrylidSteps:First,getaglassofhotwaterandadrylid.Next,putthelidontheglass.Thenwaitfortenseconds.Finally,takethelidoff,andfindoutwhatisunderthelid.Result:_______________________________areundertheli
8、d.It’sbecausethehotwaterintheglass_________________.Thesteamturnsinto_______________________________underthelid.Experiment(A)DropsofwaterturnsintosteamdropsofwaterformsMayThetitleoftheexperiment：Three_______ofwaterThedate:
