Unit10WaterFestival

Unit10WaterFestival,Thethreeformsofwater,AnExperiment,Warming-up,Three_ofwater,akindoratype,turninto,water,ice,steam,forms,fm,Caterpillars(毛毛虫)canturnintobutterflies.,Lookandlearn,Water_at100.,Water_at0.,boils,freezes,freeze,/friz/,/friziz/,freezes,v.使结冰,blz,Whenwetaketheiceoutofthefridge,itwill_.,Whenweputabottleofwaterintoice,itwill_.,melt,cooldown,makesthcoolorcooler,boil,freeze,melt,cooldown,Thinkandmatch,melts,boils,freezes,coolsdown,Listenandwrite,Ivegotsomequestionsforyoutothinkabout.Whathappenswhenwater_?Whathappenswhenwater_?Whathappenswhenice_?Whathappenswhensteam_?,boils,freezes,melts,coolsdown,Whathappenswhenwater_?,Whathappens_?,boils,whenwaterfreezes,Lookandsay,What_?,happenswhenicemelts,Whathappenswhensteamcoolsdown?,Whenweputthe_intothefridge,it_andturnsinto_.,water,ice,Whenwater_,itturnsinto_.,ice,freezes,freezes,Whenwetakeoutthe_fromthefridge,it_andturnsinto_.,ice,water,melts,Whenice_,itturnsinto_.,melts,water,When_,itturnsinto_.,steam,water,boils,When_,it_water.,steam,turns,into,coolsdown,Whenwaterfreezes,itturnsintoice.,Whenicemelts,itturnsintowater.,Whenwaterboils,itturnsintosteam.,Whensteamcoolsdown,itturnsintowater.,S1:Whathappenswhen_?,S2:When_,it_.,freezes,ice,water,water,into,turns,freezes,Pairwork,S1:Whathappens_?,S2:When_,_.,icemelts,whenicemelts,itturnsintowater,S1:What_?,S2:When_,_,happenswhenwaterboils,waterboilsitturnsintosteam。,S1:_?,S2:_.,Whathappenswhensteamcoolsdown,Whensteamcoolsdown,itturnsintowater.,Whenwaterboils,itturnsintosteam.,Whenwaterfreezes,itturnsintoice.,Whenicemelts,itturnsintowater.,Whensteamcoolsdown,itturnsintowater.,1.Whathappenswhenwaterboils?,2.Whathappenswhenwaterfreezes?,3.Whathappenswhenicemelts?,4.Whathappenswhensteamcoolsdown?,Listenandask,1._,2._,3._,4._,coolsdown,Writeandsay,boils,freezes,melts,S1:What?S2:When.WhatS1.S2.,S1:What?S2:When.,S1:What?S2:When.What?S3:When.What?S4:When.What?S1:When?.,Groupwork,ice,water,steam,Playagame,Youcanaskthequestiontooneofthestudentaroundyou,andthatstudentshouldanswerthequestionfirst,thenfindnextstudenttoaskthequestion.,Thinkandsay,Lookattheoutsideoftheglass.Whatisontheglass?,Dropsofwater.,Howdoesithappen?,Whenthesteamintheaircoolsdown,itturnsintodropsofwateronthecoldglass.,Whatsunderthelid?,Dropsofwater.,Howdoesithappen?,Thehotwaterintheglassturnsintosteam.Whensteamcoolsdown,itturnsintodropsofwaterunderthelid.,ld,Dopeopleputtheknowledgeintopractice?Canwefindanexampleinourdailylife?,Thedryicemakethesteamintheairsuddenlycooldown,andthesteamturnsintowaterd