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1、 选修8 英语教学课件系列 Unit5Meetingyourancestors UsingLanguage Theworkonearlypeopledependsonthedatesgiventothebonesthatarefound Ifthedatesarewrong allthedataaboutearlypeoplemayalsobewrong SoZhouHepingisveryinterestedtofindouthowarchaeologistsmakesurethattheirdatesareaccurate Listeninganddiscussing yogurtpots
2、 orangeskin wastepaper usedenvelopes 1ListentoPart1ofthetapeandtrytounderstand thewastepaperbasket diagramontherightandfillinthelayers Itusesradioactivitytomeasuretheamountof inlivingthings The inadeadbody ata rate Weknowhowlongthattakes sowecanmeasuretheamountof and howoldaboneis carbon carbon disa
3、ppears fixed carbon workout 2ListentoPart2andcompletethepassagebelow 3Lookatthisarchaeologicaldrawingofasectionshowingbuildingsatdifferenttimesandworkouttheorderinwhichtheywerebuilt Writeyouranswerbelowandcheckwithyourpartner Remembertogiveareasonforyouranswerinyourdiscussion TheoldestbuildingisBbec
4、auseithasnolayersunderneathit ThesecondoldestbuildingisCbecauseithasnolayerunderneathit ThatlayeristheremainsofthebuildinginB ThemostrecentbuildingisbuildingA Ithastwolayersunderneath TheyaretheremainsofbuildingsBandC ZH Howcanyoutellhowoldbonesarewhenyoufindthem LISTENINGTEXT P42 DATINGMETHODS Zhou
5、Hepinghascometoaskthearchaeologist RichardLeakey howhedatestheboneshefinds Part1 RL Therearetwomainways thefirstuseslayersinthegroundandthesecondusestheradiocarbondating ZH Howdoesthelayermethodwork RL Well Lookatthediagraminyourbook Thinkofyourwastepaperbasket Whenyoucameintowork youthrewtheoranges
6、kinintoit That slayernumber1 Latersomebodythrewyogurtpotsintoit That slayernumber2 ZH Ohyes andthenIthrewsomepaperintoit Sothat slayernumber3 RL Yes andfinallysomeonethrewsomeusedenvelopes Sohowmanylayersarethereinthiswastepaperbasket ZH TherearefourRL Good Nowwhichlayeristhefirstandthereforetheolde
7、st ZH Theorangeskin RL Andwhichisthelastandthereforethemostrecent ZH Ofcourse theusedenvelopes Iseehowitworksnow Buthowdoesithelp RL Well layersofsoilareproducedatdifferenttimeslikethelayersinyourwastepaperbasket Eachtimepeoplelivesomewhere theymakealayerinthesoil Iftheylivethereforalongtime theymak
8、ealotoflayers Eachlayerhasadifferentcolourandtexturewhichweusetofindouthowolditis ZH Howsplendid ZH Nowwhataboutradiocarbondating RL Thisismorescientific Itusestheradioactivitytomeasuretheamountofcarboninlivingthings Thecarboninadeadbodydisappearsatafixedrate Weknowhowlongthattakes sowecanmeasurethe
9、amount Part2 ofcarbonandworkouthowoldaboneis ZH That sveryclever Isitaccuratetoo RL Therearesomeproblemswithveryoldbones soyouarealwaysgiventwodates ZH Howdoesthatwork RL Well thedateforabonemaybebetween9 900yearsand10 100yearsold ZH Isee HowoldarethebonesfromtheZhoukoudianCaves RL Theyarebetween250
10、 000and400 000yearsold ZH Perhapswecouldvisitthesitetogethersometime RL Ofcourse Wheneveryoulike THEFEAST 18 000BC 北京人生活想象图 北京猿人的化石首次发现于1927年1929年12月2日发现第一个完整的头盖骨到1937年已发现的北京人的头盖骨共5个 1941年12月太平洋战争爆发后 在几个美国人手里弄得下落不明 1966年又发现一个残破的头盖骨 总共发现了属于40多个个体的北京人化石 时间距今约七十万年至二十万年 北京人 能够制造和使用劳动工具 能使用天然火 摆脱了杂交的婚姻形态
11、 生活艰苦 寿命比较短暂 北京猿人的特征 北京人使用过的石器 北京人石器制作法 山顶洞人 距今时间 18000年前 地点 北京周口店龙骨山山顶洞穴 体形 同现代人大体一样 脑容量 1300 1500毫升 生产和生活 开始采用磨制和钻孔技术制造石器 骨器制造骨针 缝制兽皮衣服产生了原始宗教仪式过着氏族公社的生活 山顶洞人头骨 山顶洞人 Drawthemainideaofeachparagraph Scanning Para1 Lalaworriedaboutthepreparationsforthefeastandshehopedthefeastcouldbeasgoodastheonelast
12、year Para2 Lalaandherfamiliesmadepreparationsforthefeast Para3 thedescriptionofDahu Para4 howdidDahumaketools Thistextismainlyanimaginativestoryaboutafamilyfeastof A agirl B aman C agirloftheearliestpeople D amoderngirl2 Fromthefirstparagraph wecanlearnthatthefamilygroupslivedon A fishB crops C hunt
13、ingD farming C C Choosethebestanswer 3 Lala sguestscameto A dance B talkaboutanimportantthing C enjoyafeast D seeLala4 Dahuwentouttosharpenthescrapersto A killanenemyB usethemasweapons C scrapethefishD cutstones C C 5 Fromthetextwecaninferthatfamilygroups A livedtogetherB livedfaraway C livedinthesa
14、mecaveD livedseparately D 1 Whoworkscooperativelyandwhodoestasksalone Bothmenandwomenworkcooperatively Forexample Lala smotherandauntswerepreparingthemeatofdeerandpigoverthefire Mendotasksalone Answerthefollowingquestionsafterreadingthetext 2 Whodoesthemostdangeroustasks Mendothemostdangeroustasks 3
15、 Wheredoesthedangercomefrom Thedangercomesfromthewildanimals 1Readthepassageandfindoutwhatthepossibleworkdivisionwasbetweenmenandwomeninprimitivesocietiesandfillinthechartbelow Makingandrepairingtools Huntinganimals Protectingthegroupfromharm Cuttingdowntrees Lookingafterchildren Preparingskinstomak
16、eclothes Cuttingupmeatandfishforcooking Collectingnuts fruitandwater InpairsworkoutwhichjobsDahudidandwhichLaladid catchfish repairstone makescrapersandaxe heads collectfruitandnuts preparefood 3Nowlookcloselyatthetasksbeforeanddiscusswhichadjectivesbestdescribeeachofthem Giveyourreasons caringtoughprotectivedangeroussafeusefulco operativepatientindividualexhaustingskilful Men stasks patient toolmaking dangerous hunting someindividual toolmakingandrepairing andsomeco operative hunting skilful to
