Unit 1 Topic 2-Section B課件 仁愛版九年級英語上冊

Unit1TheChangingWorldTopic2Thepopulationindevelopingcountriesisgrowingfaster.SectionBLanguagegoalsBytheendoftheclass,youwillbeableto1.Masterthefollowingwords,phrasesandsentences:Words：

population,billion,increase,reach,luckily,policy,Russia,measurePhrases:

increaseby,developingcountries,developedcountries,carryout,theone-childpolicySentences：①Whatalargepopulation!

②Theworldhasapopulationof6.8billion.③Soitis.2.ReadnumbersinEnglish.3.Talkaboutpopulationproblems.選用所給單詞或詞組填空already,yet,ever,never,havebeento,havegoneto1.Tomhas_______________finishedhishomework.Nowheisplayingfootballontheplayground.2.Haveyou__________beentotheGreatWall?3.Shehasn'tcomeback_______________.4.Ihave____________heardofthatbefore.Itissostrange.5.Hashekeptthebook_______________?6.-Haveyouseenthefilm?---Yes.Ihave__________________seenit.7.__________youever_______________Hainan?8.Mr.Wangisn'there.He________________Shanghai.Revisionjust/alreadyeveryetneveryetjust/alreadyhavebeentohasgonetoonehundredandfiftyyuanthousandsofpeopletwopointtwosix(2.26)meterstall

twothousandandeightOlympicGamesnumbersinourlives1,000,000,000one

billion1,000,000one

million1,000one

thousand3.14three

point

onefour100one

hundred

Look,readandlearnHowtoreadnumbers?1,000,000,000billionmillionthousand1

000000

0002Listenandreadthenumbers,payingspecialattentiontotheintonation.Thenreadtheothernumberswithyourpartner.543.7fivehundredandforty-threepointseven

1562onethousand,fivehundredandsixty-two6004001sixmillion,fourthousandandone7198764502sevenbillion,onehundredandninety-eightmillion,sevenhundredandsixty-fourthousand,fivehundredandtwo973ninehundredandseventy-three3980threethousand,ninehundredandeighty98721ninety-eightthousand,sevenhundredandtwenty-one768540sevenhundredandsixty-eightthousand,fivehundredandforty1,000,000,000billionmillionthousand2346780twomillion,threehundredandforty-sixthousand,sevenhundredandeighty82346580eighty-twomillion,threehundredandforty-sixthousand,fivehundredandeighty405000000fourhundredandfivemillion5555555555fivebillion,fivehundredandfifty-fivemillion,fivehundredandfifty-fivethousand,fivehundredandfifty-five1,000,000,000billonmillionthousand6800808080The

population

isincreasingby

80millioneveryyear.=Theworldhasapopulationof6.8billion.Whatalargepopulation!1bListento1aandmatchtheinformation.1.theworld2.China3.India4.theUSAA.309millionB.6.8billionC.1.3billionD.1.1billionMakesimilarconversationsaftertheexample.Example:A.:What’sthepopulationoftheworld?B:It’sabout6.8billion.1.theworld2.China3.India4.theUSAA.309millionB.6.8billionC.1.3billionD.1.1billion1cRead1aandfillintheblanks.

Theworldhasapopulationof6.8billionanditisincreasingby__________everyyear._______hasthelargestpopulation.Ithasalreadyreached__________andIndiais_________with1.1billion.Thepopulationindevelopingcountriesis______andisgrowing________thanthatindevelopedcountries.Luckily,ourcountryhascarriedoutthe___________policytocontrolthepopulation.80millionChina1.3billionsecondlargerfasterone-childThesupermarketisverycrowded.Soitis.

So+主語+

be/情態(tài)動詞/助動詞Lucydancesverywell.Shehascleanedtheroom.Soshedoes.Soshehas.Soitis.確實如此。LanguagePointse.g.

Thepopulationofthiscityisnearly300000.這個城市的人口將近三十萬。e.g.80%ofthepopulationinChinaare

farmers.中國百分之八十的人口是農(nóng)民。e.g.ThepopulationofChinaisverylarge.中國人口眾多。Thepopulationinthisareaisbecomingsmallerandsmaller.這個地區(qū)的人口越來越少。強調(diào)人口的具體分布或構(gòu)成(作復(fù)數(shù)）population集合名詞某地整體人口的數(shù)量(作單數(shù)）通常用large/big/small

來修飾。increaseby+數(shù)字/倍數(shù)/百分數(shù)增加了……e.g.Thepriceofthehousehasincreasedbythreetimes.

increaseto+數(shù)字增加到……e.g.Thepriceofthehousehasincreasedto500000.

250250250250250250500A：Whata

largepopulation!Theworld…6.8billion.…80millioneveryyear.B：Whichcountry…?A：China…reach…,andIndia…with….B：…theUSA?A：309million.B：Itshows…developingcountries…developedcountries.A：…isgrowingfaster…B：Soitis.Thepopulationproblem…developingcountriesA：China…carryout…controlthepopulation.3Workingroupsanddiscussthepopulationoftheworld.Thefollowingchartandquestionsmayhelpyou.1.Whichofthese5countrieshasthelargest/smallestpopulation?What’sthepopulationofit?2.Whatcanyoutellfromthepopulationindevelopingcountriesandindevelopedcountries?3.Whatproblemsdoesthelargepopulationcause?4.Whatmeasuresdoyouthinkshouldbetakentocontrolthepopulation?Chinahasthelargestpopulation.ThepopulationofChinais1.3billion.Canadahasthesmallestpopulation.ThepopulationofCanadais34million.Thepopulationindevelopingcountriesislargerthanthatindevelopedcountries.Thelargepopulationmaycauselesslivingspace,morepollutionandsoon.Choosethebestanswer.1.—__