冀教版英语九年级全册 Unit 5 Look into Science-Lesson 28 The Study of Living Things 课件.pptx

Unit5LookintoScience冀教版英语九年级全一册

Lesson28TheStudyofLivingThings

学习目标Curriculumwords：ChipTaylor,biology,butterfly,migrate,fantastic,completelyUsefulexpressions：FantasticfactsaboutthebutterflyhavebeendrawingDr.Taylor’sattention.Here,asmanyas230millionbutterfliesspendthewinter.

Functions:Masterthenewwords：ChipTaylor,biology,butterfly,migrate,completely,grandchild,female,milkweed,chemical,puzzlingGrammar:almost的用法Sentences:ButinMexico,peoplecutdownthetreesthatthebutterfliesneedtorestonbecausetheywantmorelandforfarming.Thisisbothpuzzlingandinterestingformanyscientists.

新课导入Doyoulikenature,why?

新课讲解THINKABOUTITWouldyouliketobeabiologistwhenyougrowup？Whyorwhynot?Whatmysteriesofnaturedoyouknowabout?课文呈现

Dr.ChipTaylorteachesbiologyatauniversityintheUnitedStates.HestudiesonekindofNorthAmericanbutterfly.Justlikeamigratingbird，thisbutterflytravelsabout4000kilometressouthinfall.FantasticfactsaboutthebutterflyhavebeendrawingDr.Taylor′sattention.

Butterfliesarebeautiful.Whatdoyouknowaboutthem?

InMexico，thebutterfliesalwaysreturntothesamesmallpieceofforest，whichisonly20kilometreswide.Here,asmanyas230millionbutterfliesspendthewinter.Theycancoversometreesalmostcompletely.Thebutterfliesthatreturntothesoutharethegreat-greatgrandchildrenofthebutterfliesthatleftforthenorth.Whentheybegintotravelnorthinspring，thefemaleslayeggs.Theylayeggsononlyoneplant：milkweed.

ButinMexico，peoplecutdownthetreesthatthebutterfliesneedtorestonbecausetheywantmorelandforfarming.IntheUnitedStatesandCanada，farmersusechemicalsthatkillmilkweed.ThisworriesDr.Tayloralot.Nowthingsareimproving.Mexicohasbeguntoprotectpartsofitsforests.TheUnitedStatesandCanadahaveenco