上海牛津7Bwaterfestival公开课课件

ThethreeformsofwaterWaterfestival ThethreeformsofwaterWater1WhoamI?Ihavenosmell,nocolour.Nothingcancutme.Ifyouwashmemore,Iwillbedirtier.Yeah!Iamwater!WhoamI?Ihavenosmell,noc2WaterQuizHowmuchofthewateronearthisavailable(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.6-8glassesWaterQuizHowmuchofthewate34)Ahundredyearsago,earthhad_______.A.muchmorewaterthanthereisnowB.alotlesswaterthanthereisnowC.thesameamountthereisnow5)Howlongcouldyoulivewithoutwater?A.AboutthreemonthsB.AboutsevendaysC.Aboutoneday6)Waterthatissafetodrinkiscalled____.

A.cleanB.pollutedC.drinkable4)Ahundredyearsago,earth4watericesteam

7)Howmanyformsdoeswaterhave?turninto转变成形态；形式watericesteam7)Howmanyform5fr__zemelt____/fri:z//bɔil/

/melt/boileefr__zemelt____/fri:z//bɔi6Lookandmatch:freezemeltboilcooldown冷却①②③④A.freezeB.meltC.cooldownD.boilLookandmatch:freezemeltboilc7ListenandfillintheblanksWhat_______whenwaterboils?Whenwater______,itturnsinto______.Whathappens_____waterfreezes?Whenwater_____,itturns____ice.Whathappenswhenicemelts?Whenwatermelts,itturnsinto_____.Whathappenswhensteam____down?When_____coolsdown,it________water.happensintofreezeswhenboilssteamwatercoolssteamturnsintoWhen...,itturnsinto...ListenandfillintheblanksW8I’vegotsomequestionsforyoutothinkabout.Whathappenswhenwaterboils?Whathappenswhenwaterfreezes?Whathappenswhenicemelts?Whathappenswhensteamcoolsdown?Whenwaterboils,itturnsintosteam.Whenwaterfreezes,itturnsintoice.Whenicemelts,itturnsintowater.Whensteamcoolsdown,itturnsintowater.I’vegotsomequestionsforyo9ThethreeformsofwaterA:Whathappenswhen…?B:When…,itturnsinto….boilsfreezesmeltscoolsdownPairworkThethreeformsofwaterA:Wha10Lookandsay①②③④When…,it….Lookandsay①②③④When…,it….11GroupCompetition:

125643GroupCompetition:12564312Whathappenswhenwaterboils?Whenwaterboils,itturnsintosteam.1Whathappenswhenwaterboils?13Whathappenswhenicemelts?Whenicemelts,itturnsintowater.2Whathappenswhenicemelts?Wh14Dropsofwater.3Putadrylidonaglassofhotwater.

Waitfor10seconds(秒).Takethelidoff.Whatcanyouseeunderthelid?Dropsofwater.3Putadrylid15Whathappenswhenwaterfreezes?Whenwaterfreezes,itturnsintoice.4Whathappenswhenwaterfreeze16Dropsofwater.Thesteamintheairturnsintowateronthecoldglass.5Putsomeicecubesinaglassofwater.Waitfor2minutes.Lookattheoutsideoftheglass.Whatisontheglass?Howdoesithappen?Dropsofwater.5Putsomeicec17Whathappenswhensteamcoolsdown?Whensteamcoolsdown,itturnsintowater.6Whathappenswhensteamcools18WaterWaterhasthreef______,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:Waterormsteamoilsreezeseltsool19Waterisimportant.

Weshouldtryourbesttosaveit!Waterisimportant.20Whathappenswhenwaterboils?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MakeasummaryWhathappenswhenwaterboils21Assignment:Oralwork:Readthetextaftertherecordingatleast3times.Writtenwork:1.Copythenewwordsandp