九年级英语上册 Unit 2 Saving the earth Topic 2 All these problems are very serious Section D课件 （新版）仁爱版.ppt

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1、Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionDWhatcanyoulearnformtheshortmovie?Waterisimportant.Becausehumans,animalsandplantscan’tlivewithoutwater.MovieNearlythreefourthsoftheearthiscoveredwithwater.waterontheearth3/4被……覆盖/'nɪəlɪ/几乎、将近Whilethereissomuchwateraroundthewo

2、rld,wehumansarestillshortofdrinkingwater.Sodoanimalsandplants.Doyouknowwhy?beshortof缺乏……1.Whyisourearththirstywhen¾oftheearthiscoveredwithwater?Becauseabout97%ofthewaterontheearthisseawaterandwecan’tuseitforwateringplantsordrinkingdirectly.2.Whatkindofwatercanhumansdrinkanduse?Humanscanonl

3、ydrinkandusefreshwaterfromplacesincludingrivers,lakesandunderground.()Althoughtheworldishungry,itiseventhirstier.Whilenearly¾oftheearthiscoveredwithwater,wearestillshortofdrinkingwater.Thisisbecauseabout97%ofthewaterontheearthisseawater.Sowecan’tuseitforwateringplantsordrinkingdirectly.Hum

4、anscanonlydrinkandusefreshwaterfromplacesincludingrivers,lakesandunderground.1Readandanswer.Howcanweavoidaseriouswatershortage?First,weshouldsavewaterandnotwasteit.Second,weshouldprotectourwaterresourcesandnotpollutethem.Third,weshoulddiscoverwaystoreusewater.()Howcanweavoidaseriouswatersh

5、ortage?First,weshouldsavewaterandnotwasteit.Second,weshouldprotectourwaterresourcesandnotpollutethem.Third,weshoulddiscoverwaystoreusewater.Scientistshavemadesomeprogressinthisfield.Today,somelargecitiesarereusingtheirwater.Butpeople’sneedforwaterisincreasingdaybyday.Westilldon’thaveenough

6、water.Whatelsecanwedo?2ReadParagraph2andmarkTorF.()Scientistshaven’tmadeanyprogressinthisfield.()Waterisreusednowhere.()People’sneedforwaterisincreasingdaybyday.FFTListentoParagraph3andfillintheblanksQ:Howcanwechangeseawaterintofreshwater?Weneedtotakethesaltawayfromtheseawater.()Thesea____

7、______havethebestanswer.Thereis_________waterinthesea.Butweneedto____thesalt_____fromtheseawater.Thisisveryexpensive.Ifscientistscanfindcheaperwaystodoit,wecan__________________oftheshortageofwater.3seemstoplentyoftakeawaysolvetheproblembeshortofontheearthuses