Unit5

Meetingyourancestors人教版選修八Unit50Listeningandspeaking0Learningaboutthemethodsofdating

archaeologicalfinds;Traininglisteningandspeakingskills;Keepinginmindsomewords,useful

sentencepatterns;Realizingtheimportanceofprotecting

culturalrelics.

0Canyouguesstheagesofthepeople,thetreeandsomeanimals?

0Theworkonearlypeopledependsonthedatesgiventothebonesthatarefound.Ifthedatesarewrong,allthedataaboutearlypeoplemayalsobewrong.SoZhouHepingisveryinterestedtofindouthowarchaeologistsmakesurethattheirdatesareaccurate.0Taskone:listenforthegeneralideaWhatmethodsarementionedtodatetheobjectsinthelisteningtext?

A.Thelayerdatingmethodandradiocarbon

datingmethod.

B.Thelayerdatingmethodandcolordating

method.

C.Thecolordatingmethodandradiocarbon

datingmethod.

Tasktwo:listenforspecificinformationPart1(1)Tickthethingsyouhaveheard.

□bones□orangeskins

□unusedenvelope□stones

□oillayer□yogurt(2)Ifpeopleliveinoneplaceforalongtime,theymake______layers.

A.fewB.manyC.no

Part1(3)Whereisthemostrecentlayerinthe

wastepaperbasket?

A.Atthebottom.

B.Inthemiddle.

C.Atthetop.

(4)ListentoPart

1ofthetapeandtrytounderstand“thewastepaperbasket”diagramontherightandfillinthelayers.

usedenvelopeswastepaperyogurtpotsorangeskinThewastepaperbasketPart2:Completethepassagebelow.Itusesradioactivitytomeasuretheamountof_______inlivingthings.The_______inadeadbody__________ata______rate.Weknowhowlongthattakes,sowecanmeasuretheamountof_______and_________howoldaboneis.carboncarbondisappearsfixedcarbonwork

out1.Canyoudiscussandconcludewithyourpartnerthathowdothetwomethodswork?2.Lookatthisarchaeologicaldrawingofasectionshowingbuildingsatdifferenttimesandworkouttheorderinwhichtheywerebuilt.Writeyouranswerbelowandcheckwithyourpartner.Remembertogiveareasonforyouranswerinyourdiscussion.

TheoldestbuildingisBbecauseithasnolayersunderneathit.ThesecondoldestbuildingisCbecauseithasnolayerunderneathit.ThatlayeristheremainsofthebuildinginB.ThemostrecentbuildingisbuildingA.Ithastwolayersunderneath.

TheyaretheremainsofbuildingsBandC.Makeadialogueabouttheagesoftheseitems.Trytousethesesentencepatterns:

Let’slookat...Whatdoyouthinkitis?Appearance:Itlookslike...Use:Itmaybeusedas/for...Material:Itcouldbemadeof/from...When:Itdatesbackto...

Condition:Itisingood/poorcondition.Conclusion:Itcouldbeolder/theoldest/themostrecent...because...Judgingby/