book3unit4reading

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1、Astronomy:thescienceofthestarsunit4Wheredowecomefrom?Orwecansay:Whoareourancestors?Pre-readingBigBangAsolidballAtmosphereTheearthItwasfullofwater.Originalcells.Thecellsinthewaterbegantoseparate.waterPlantsinthewaterShellfishandfishPlantsonlandInsectsandamphibiansReptilesDinosaursMammalsManhadevo

2、lvedfromapes.Doyouknoweachreligionorculturehasitsownideasaboutthebeginningoftheuniverse?PanguseparatestheskyfromtheearthOtherlegendsaboutthebeginningofuniverseDay1:GodspokeandseparatedlightfromdarknesscreatingDayandNightDay2:GodspokeandseparatedthewatercreatingskyandoceanDay3:Godspokeandcreatedd

3、ryland上帝创世说：Day4:Godspokeandcreatedthesun,moonandstarsDay5:GodspokeandcreatedlivingcreaturesintheairandseaDay6:GodspokeandcreatedthelandanimalsandmanDay7:GodrestedandblessedthisdaycallingitHolyIndiaBrahma(婆罗门)isthegodfirstrepresentedintheHinduTriad.Heisthecreatoroftheuniverseandalllivingbeingsar

4、esaidtohaveevolvedfromhim.ReadingListentothetapewithbooksclosedandchoosethebestanswers.Whywastheearthdifferentfromotherplanets?Itproducedalotofheat.Thewaterremained.Waterdisappeared.Itwastheoldestplanet.B2.Whywaslifeabletodevelopontheearthbutnotonotherplants?Theearthhadasolidshape.Theearthdidnot

5、haveharmfulgasesinitsatmosphere.Thewaterstayedontheearthbutnotonotherplants.Theearthwasnottoohotandnottoocold.C3.Whywasitnecessaryforplantstogrowbeforeanimals?Animalsneededplantstoprotectthemfromthesun.Plantsprovidedoxygenforanimalstobreathe.Animalscouldhidefromhuntersinforests.Itwaseasierforpla

6、ntstogrow.B4.Whatproblemiscausedbyhumanbeings?Theyexisteverywhereontheearth.Theycauseglobalwarming.Theyfindnewmethodsofgrowingcrops.Theyenjoyhuntingandfishing.BScanthepassageandfinishthefollowingTrueorFalseexercises.1)Theexplosionoftheearthproducedwatervapor,whichturnedintowaterwhentheearthcoole

7、ddown.2)Animalappearedbeforeplants.3)Theearthmaybecometoohotforlifetoliveonit.(T)(F)Para.3Sentence2(T)Para.4Para.1Scanthetextandfindtheusefulphrasesandunderlinetheminyourbook.1.根据，按照2.广为接受的理论3.以…开始4.一团尘埃5.及时做某事6.冷却7.是…的基础8.允