牛津深圳版英语七下Unit5《Water》(SpeakingWriting)课件

SpeakingATalkingtimeTrytoreadthetonguetwisterasquicklyaspossible.Iscream,youscream,weallscreamforicecream!Readthewordsandlearnabout/str/,/spl/,/spr/,/skr/.A1Listencarefullyandcirclethewordsyouhearfromeachpair.1./strei//stei/2./striŋ//spriŋ/3./split//spit/4./'splendə(r)//'spendə(r)/5./skri:m//stri:m/6./stript//skript/A2Readthesesentences.Payattentiontothelettersinbold.1.Thestrawberryplantinthestreetlooksstrange,butthestrawberriesareniceandsweet.2.Heavyrainsplatteredontheroofandsplashedagainstthewindowsofthesplendidhouse.3.Sprinkletheseedsaround.Spreadthemout.Inspring,youwillhavegreensprouts.4.Thescreenwriterscreamedwhenshesawthescript.Howdosewaterbecomerain?蒸发BSpeakupHowdoeswaterbecomerain?Ingroups,talkaboutthisprocess.First,…Then,…Next,…Finally,…•heatsthewater•becomesvapour•formsclouds•coolsandformssmalldropsofwater•rainfallsThesunheatsthewater.MorevapourintheairVapourcoolsandformsdropsofwater.Completetheflowchattolearnmoreaboutthisprocess.First,theSunheatsthewaterinthesea.Thewaterbecomesvapourandrisesfromthesea.Then,moreandmorevapourformsintheairandmakesclouds.Whenthevapourcools,itbecomessmalldropsofwater.Thenthesmalldropsofwaterbecomestooheavytostayintheair.Finally,rainfalls.Discuss1.Wheredoesraincomefrom?2.Whatmakeswaterrisefromthesea?3.Howcancloudbecomerain?4.Whatdoeswaterforminthesky?根据实际情况回答下列问题。1.Howcanwesavemorewater,byhavingabathortakingashower?2.CanwedrinkallthewateronEarth?3.Whatcanyoudotosavemorewateratyourhome?4.Whichismoreusefultous,cocacolaorwater?5.Howmanyglassesofwaterdoweneedeveryday?Didyouknow?Howtowriteanexperiment?(格式)1.多用无主语的祈使句。2.常用表示时间先后顺序的序数词或时间副词。Addsomesaltto…Heatthewater.First,…Second,…Then,…Finally,…Writing:AnexperimentWritingA:Whatexperimentistheboydoing?Ingroups,describethepictures.saltstir(搅拌)Addsomesalttoaglassofwater.Stirthewater.(disappear,becomepartof)Heatthewater.(awhitecloud,bemadeupof,smalldropsof,continue)Finally,…(starttodryup)Writing:AnexperimentFinally,…(starttodryup)Heatthewater.(awhitecloud,bemadeupof,smalldropsof,continue)Stirthewater.(disappear,becomepartof)Addsomesalttoaglassofwater.UsingaflowchartGoovertheprocessofhowwaterbecomesrain.Takenotesontheimportantsteps.WritingBWriteashortparagraphaboutthisexperiment.UsetheinformationinAtohelpyou.First，addsomesalttoaglassofwater.____________________________________________________________________________________________________________Finally,______________________________.Thesaltturnsintocrystals.First,addsomesalttoaglassofwater._________________________________________________________________________________________________________________________________________________________________________Finally,_________________________.Thesaltturnsintocrystals.thewater.Thesaltdisappearsandbecomespartofthewater.Next,heatthewater.Youcanseeawhitecloud.Itismadeupofsmalldropsofwater.Continuetoheatthewater.thewaterstartstodryup.Thenstir