高中英语 45(unit 4 astronomy reading )课件 新人教版必修3 课件VIP免费

新课标人教版课件系列《高中英语》必修3-4.5•Doyouknoweachreligionorculturehasitsownideasaboutthebeginningoftheuniverse?1.Panguseparatestheskyfromtheearth2.Nuwamakeshumanbeings3.Godcreatedman.ThebigBangisusedtodescribeahugeexplosionthatscientistsbelievehappenedaround15billionyearsago,createdouruniverse.What’sthesientificidea?Unit4:Astronomy:thescienceofthestarsSolarsystem:ismadeupofthesunandtheobjectsthatorbit(盘绕)it.Theseincludethenineplanetsandtheirmoons（卫星）,aswellascomets（彗星）,andmeteors（流星）.Blackhole:mayeateverythingthatcomesclosetothem.Sometimestheythrowoutmaterial.Thatishownewstarsandplanetsdevelop.FastReading(Readthefirstparagraph)Howdidwatercomeintobeingontheearth?Howdidwatercomeintobeingontheearth?Whyisimportanttohavewaterontheearth?Whyisimportanttohavewaterontheearth?Theexplosionoftheearthproducedwatervapor,whichturnedintowaterwhentheearthcooleddown.Itallowedtheearthtodissolveharmfulgasesintooceansandseas.Readthesecondandthirdparagraph,andfinishthechart:Smallplantsinwater_______andallsortsoffishgreenplantson________-_________dinosaurs_________________Insects(onland),______(onland/inwater)developdevelopappearappearappearappearShellfishamphibianreptilesmammalslandforestCanyouputtheorderofdevelopmentoflifeintoatimeline?(A)insectsandamphibiansappear(B)asolidball(C)reptilesappear(D)acloudofdust(E)shellfishandotherfishappear(F)dinosaursappear(G)smallplantsgrowonthewater(H)plantsbegintogrowondryland(I)presenceofwater(J)mammals(includinghumans)appear12345678910Thinkaboutwhatyouhavereadandmakechoices.Whywastheearthdifferentfromotherplanets?Aitproducedalotofheat.B.Thewaterremained.CWaterdisappeared.D.Itwastheoldestplanet.Whywaslifeabletodevelopontheearthbutnotonotherplanets?ATheearthhadasolidshape.B.Theearthdidnothaveharmfulgasesinitsatmosphere.CThewaterstayedontheearthbutnotonotherplanets.D.Theearthwasnottoohotandnottoocold.Whywasitnecessaryforplantstogrowbeforeanimals?AAnimalsneededplantstoprotectthemfromthesun.BPlantsprovidedoxygenforanimalstobreathe.CAnimalscouldhidefromhuntersinforest.DItwaseasierforplantstogrow.Whatproblemiscausedbyhumanbeing?ATheyexisteverywhereontheearth.BTheycauseglobalwarming.CTheyfindnewmethodsofgrowingcrops.DTheyenjoyhuntingandfishing.Discuss:Istheearthgettingwarmereachyear?Ifso,whateffectswillthishave?What’sthe“greenhouseeffect”?Yes.?Homework:Homework:Finishexercises1,2,3,4onpage27,28Finishexercises1,2,3,4onpage27,28Readthetextagain.Readthetextagain.