上海牛津7Bwaterfestival公开课

上海牛津7Bwaterfestival公开课第1页/共23页WhoamI?Ihavenosmell,nocolour.Nothingcancutme.Ifyouwashmemore,Iwillbedirtier.Yeah!Iamwater!第2页/共23页WaterQuizHowmuchofthewateronearthisavailable(可利用的）

todrink?A.95%B.26%C.1%2)Howmuchofyourbodyismadeupofwater?A.75%B.25%C.6%3)Howmuchwatershouldyoudrinkdailyforgoodhealth?A.1-2glassesB.3-4glassesC.6-8glasses第3页/共23页4)Ahundredyearsago,earthhad_______.A.muchmorewaterthanthereisnowB.alotlesswaterthanthereisnowC.thesameamountthereisnow5)Howlongcouldyoulivewithoutwater?A.AboutthreemonthsB.AboutsevendaysC.Aboutoneday6)Waterthatissafetodrinkiscalled____.

A.cleanB.pollutedC.drinkable第4页/共23页watericesteam

7)Howmanyformsdoeswaterhave?turninto转变成形态；形式第5页/共23页fr__zemelt____/fri:z//bɔil/

/melt/boilee第6页/共23页Lookandmatch:freezemeltboilcooldown冷却①②③④A.freezeB.meltC.cooldownD.boil第7页/共23页ListenandfillintheblanksWhat_______whenwaterboils?Whenwater______,itturnsinto______.Whathappens_____waterfreezes?Whenwater_____,itturns____ice.Whathappenswhenicemelts?Whenwatermelts,itturnsinto_____.Whathappenswhensteam____down?When_____coolsdown,it________water.happensintofreezeswhenboilssteamwatercoolssteamturnsintoWhen...,itturnsinto...第8页/共23页I’vegotsomequestionsforyoutothinkabout.Whathappenswhenwaterboils?Whathappenswhenwaterfreezes?Whathappenswhenicemelts?Whathappenswhensteamcoolsdown?Whenwaterboils,itturnsintosteam.Whenwaterfreezes,itturnsintoice.Whenicemelts,itturnsintowater.Whensteamcoolsdown,itturnsintowater.第9页/共23页ThethreeformsofwaterA:Whathappenswhen…?B:When…,itturnsinto….boilsfreezesmeltscoolsdownPairwork第10页/共23页Lookandsay①②③④When…,it….第11页/共23页GroupCompetition:

125643第12页/共23页Whathappenswhenwaterboils?Whenwaterboils,itturnsintosteam.1第13页/共23页Whathappenswhenicemelts?Whenicemelts,itturnsintowater.2第14页/共23页Dropsofwater.3Putadrylidonaglassofhotwater.

Waitfor10seconds(秒).Takethelidoff.Whatcanyouseeunderthelid?第15页/共23页Whathappenswhenwaterfreezes?Whenwaterfreezes,itturnsintoice.4第16页/共23页Dropsofwater.Thesteamintheairturnsintowateronthecoldglass.5Putsomeicecubesinaglassofwater.Waitfor2minutes.Lookattheoutsideoftheglass.Whatisontheglass?Howdoesithappen?第17页/共23页Whathappenswhensteamcoolsdown?Whensteamcoolsdown,itturnsintowater.6第18页/共23页WaterWaterhasthreef______,theyares______,iceandwater.Whenwaterb_____,itturnsintosteam.Whenwaterf______,itturnsintoice.Whenicem_____,itturnsintowater.Whensteamc____d____,itturnsintowater,too.Ifyouputadrylidonaglassofhotwater,andwaitfortenseconds,thent_____thelido__,you’llfinddropsofwateronthelid.That’sbecausethehotwaterintheglass

t____i___steamandthesteamturnsintodropsofwateronthelid.Ifyouputsomeicecubesinaglassofwaterandwaitfortwominutes,thenlookattheo______oftheglass,you’llfindd____ofwaterontheglass,too.That’sbecausethesteamintheairturnsintowateronthec___glass.Alllivingthingsneedwatertolive.Peoplecanlives_____weekswithoutfood,butonlyafewdaysw_____water.Weshoulddrink6-8g______ofwatereachday!Withoutwater,theearthwouldlook

likethemoon.Howterribleitwouldbeifthereweren__water!ormsteamoilsreezeseltsoolsownakeffurnsntoutsideropsoldeveralithoutlassesoReadandfillintheblanks:第19页/共23页Waterisimportant.

Weshouldtryourbesttosaveit!第20页/共23页Whathappenswhenwaterboils?whenwaterfreezes?whenicemelts?whensteamcoolsdown?When…,itturnsinto_____.

form

n.

形态；形式

melt

v.

融化

boil

v.煮沸

freeze

v.

（使冻结，结冰）

(froze--frozen)

cooldown

变凉；冷却下来turninto转变成；将……变成Makeasummary第21页/共23页Assignment:Oralwork:Readthetextaftertherecordingatleast3times.Writtenwork:1.Copythenewwordsandphrases.2.Findout