Unit7SectionA1a-2c课件人教版八年级英语下册

What’sthehighestmountainsintheworld?What’sthehighestmountainsintheworld?Unit7SectionA1a-2cLearningobjectives：Bytheendofthisclass,wewillbeableto:knowaboutthreegeographicalfactsintheworldandmanygeographicalfactsinChina.usesuperlativeformstotalkaboutthegeographicalfactsandlearntoreadbignumbers.usewhatwelearntointroduceChinaandbeproudofChina.Step1LeadinHowdoyoufeelwhenyouhearthemusic?Ifeellikegoingtravelling.Step1LeadinWheredidwevisitjustnow?QomolangmathehighestmountainintheworldStep2PresentationWheredidwevisitjustnow?theSaharathebiggestdesertintheworldStep1LeadinWheredidwevisitjustnow?theCaspianSeathedeepestsaltlakeintheworldStep2PresentationWheredidwevisitjustnow?theNilethelongestriverintheworldStep31aMatchthefactswiththepictures.about9,000,000squarekilometersinsize1,025metersdeep6,671kilometerslong8848.86metershighStep3Matchthefactswiththepictures.about9,000,000squarekilometersinsize1,025metersdeep6,671kilometerslong8848.86metershigh1,025metersindepth6,671kilometersinlength8,848.86metersinheight基数词+单位+形容词=基数词+单位+in+名词Step4WaystoreadnumbersHowtoreadbignubmbers

inEnglish?1023456789.891,023,456,789.89从个位数向前数，每三位数用一个逗号隔开。Step4WaystoreadnumbersHowtoreadbignubmbersinEnglish?1,023,456,789.89pointthousandmillionbilliononebilliontwenty-threemillionfourhundredandfifty-sixthousandsevenhundredandeighty-ninepointeightnineonebilliontwenty-threemillionfourhundredandfifty-sixthousandsevenhundredandeighty-ninepointeightnineStep4WaystoreadnumbersHowtoreadbignubmbers

inEnglish?百位数的读法+单位pointbillionthousandmilliontrillion“点”“千”“百万”“十亿”“万亿”Step5Practice9,000,000squarekilometersmillionninemillionsquarekilometers九百万平方千米HowbigistheSahara?It’s9,000,000

insize.

It’sthe_______desertintheworld.biggestStep5Practice1,025metersthousandonethousandandtwenty-fivemeters一千零二十五米HowdeepistheCaspianSea?It’s1,025metersdeep.It’sthe_______saltlakeintheworld.deepestStep5Practice6,671kilometers六千六百七十一千米thousandsixthousandsixhundredandseventy-onekilometersHowlongistheCaspianSea?It’s6,671kilometerslong.It’sthe_______riverintheworld.longestStep5Practice8,848.86metersthousandeightthousandeighthundredandfourty-eightpointeightsixmeters八千八百四十八点八六米HowhighisQomolangma?It’s8848.86metershigh.It’sthe_______mountainintheworld.highestStep61bListenandcompletethesentences.Qomolangmais_______thananyothermountains

intheworld.TheSaharais_________desertintheworld.TheCaspianSeais__________ofallthesaltlakes.TheNileis_________riverintheworld.higherthe

biggestthedeepestthelongestStep7Rewritethesentences.Qomolangmaishigherthan

anyothermountain

intheworld.=Qomolangmaisthehighestmountain

intheworld.2.TheSaharaisthebiggestdesertintheworld.3.TheCaspianSeaisthedeepestofallthesaltlakes.4.TheNileisthelongestriverintheworld.TheSaharaisbiggerthananyotherdesertintheworld.TheCaspianSeaisdeeperthananyothersaltlake.TheNileislongerthananyotherriverintheworld.比较级+thananyother+名词单数=the+最高级+名词单数比较级表示________最高级A:What’sthe......intheworld?B:......A:Howhigh/big/deep/longisit?B:Itis......

Step81cUsetheinformationin1btomakeconversations.8848.86metershigh6,671kilometerslong9000000squarekilometersinsize1,025metersdeepStep9KnowaboutChinaHowmuchdoyouknowaboutChina?Step102aListenandnumberthefacts[1-4]intheorderyouhearthem.____TheYangtzeRiverisabout________kilometerslongandtheYellowRiveris________kilometerslong.____Chinahasthebiggestpopulationintheworld.It’salotbiggerthanthepopulationoftheUS.____Chinaisover________yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven________yearsold.____ChinaisalmostasbigastheUS,anditisthebiggestcountryinAsia.4213Step102bListenagainandfillintheblanksin2awiththenumbersinthebox.6,300 5,000 5,464 300____TheYangtzeRiverisabout________kilometerslongandtheYellowRiveris________kilometerslong.____Chinahasthebiggestpopulationintheworld.It’salotbiggerthanthepopulationoftheUS.____Chinaisover________yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven________yearsold.____ChinaisalmostasbigastheUS,anditisthebiggestcountryinAsia.42136,3005,4645,000300Step112cRoleplay.WiththedevelopmentofChina.Peoplearoundtheworldwanttoknowmore