UndertheSeaUnit3zxxkw学科网学.科.网,Today,we’regoingtotakealookattheworldunderthesea.So,areyouready?,Now,weareonasnorkelingtripunderthesea.We’llcomeacrossagreatvarietyofmarineanimals.Comeon!,Dolphins海豚Whatarethey?zxxkw学科网,Turtle海龟Look.It’scomingtowardsus.,Seahorse海马What’sthis?,Squid鱿鱼,Seastar海星Thislooksbeautiful!,Jellyfish水母,Coral珊瑚,Angelfish天使鱼Differentkindsoflittlefish,Anemonefish海葵鱼,Clownfish,Asharkiscoming.Lookout!It’sdangerous.,Henoticedus.We’dbetterleavehimalonebeforeit’stoolate.Bye,MrShark!,Wearesafenow.AndIcaughtaseastarneartheshore.,Ifyoulike,wherecanyougotoseemoreabouttheoceanlife?onaboattripinbooks,ontheInternet,intheOceanPark,onTVetc.atanaquarium,Ingroups,makealistofplantsandanimalsthatliveundertheseathatyouandyourclassmateshaveseeninanyofthewayslistedabove.Sharewhatyouknowabouttheseplantsandanimals.,What’shappeninginthepictures?AKillerWhale,Whalesarehuge,intelligentseamammals.Theybreatheairthroughblow-holesintolungs(unlikefishwhobreatheusinggills).Whaleshavesmooth,shiny,streamlined(流线型）bodiesthatmoveeasilythroughthewater.Whatisawhale?,Therearetwotypesofwhalesalivetoday:toothedwhales(齿鲸类)andbaleenwhales(须鲸类).Toothedwhaleshaveteethandasingleblowhole.Theyfeedoneatfishandotherseamammals.Baleenwhalesarelargerthantoothedwhales.Theyarefilterfeeders(滤食者)thatusebaleentosieve(过滤)food,andhavetwoblowholes.Classificationofwhales,Killerwhales(虎鲸)belongtotoothedwhales,whoarethelargestofthedolphinsandkingofthesea,biggestcarnivore(食肉动物)ofthesea,killingallkindsofanimalsinthesea,eventhehugebluewhale,liketigersonland,workinginateam.,Averagelifespan:50to80yearsSize:7to9.7mWeight:upto6tons,Killerwhales,Baleenwhalesarecharacterizedbyhavingbaleenplatesforfilteringfoodfromwater,ratherthanhavingteeth.Baleenwhalesaregenerallylargerthantoothedwhales,andfemalesarelargerthanmales.Thisgroupincludesthelargestknownanimalspecies,theBlueWhale.,Baleenwhales,Whatdoyouthinkishappeninginthepicture?Readtheintroductionofthepassageonpage19andthenfillinthechartbelow.Pre-reading,WriterVocationStyleTimePlaceMainideaClancyAwhalerAnecdotesAtthebeginningofthe20thcenturySoutheasterncoastofAustraliaThekillerwhaleshelpedthewhalerskillbaleenwhalesBriefintroductionofthepassage,HomeworkLookupthenewwordsandexpressionsofthereadinginthedictionary.2.Previewthereading:OLDTOMTHEKILLERWHALE,Thankyou.
