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1、Unit4Astronomy:thescienceofthestarsWarmingupmedicinebiologychemistryastronomyphysicsmathematicsgeophysicsgeologyphysicsbiochemistrybiologychemistryAstronomyisthescientificstudyoftheuniverseandtheheavenbodies(suchasthesun,themoon,andstars),gas,anddustwithinit.astro
2、nomerSolarsystem1.Doyouknowhowdidtheuniversebegin?Eachreligionorculturehasitsownideasaboutthebeginningoftheuniverse?Pre-readingPanguseparatestheskyfromtheearth.PanguseparatestheskyfromtheearthPanguseparatedtheearthandskywithanax.Afterhedied,hisbreathbecamewindandc
3、loud;hisvoicebecamethunderandhislefteyesunandrightonemoon;armsandlegsbecameedgesandmountains;bloodbecameriversandtendon(筋脉)becameroads;musclesbecamefieldsandhairstars;teethandbonesbecamemetals,pearlsandjade;sweatbecamerain.ReadingHowLifeBeganontheEarthDoyouknowthe
4、originofthehumanbeings?Manhadevolvedfromapes.EarthHowlifebeganontheearthTheBigBangwaterPlantsinthewaterShellfishandfishPlantsonlandInsectsandamphibiansReptilesDinosaursMammalswatergreenplantsonland234HowlifebeganontheearthAnalysing5678forestsshellfishandallsortsof
5、fishinsects(onland)amphibians(onlandandinwater)reptiles(onland)dinosaurs(onland)mammals(onland)smallcleveranimalswithhandsandfeethumansmallplantsinwater1AcloudofdustCombineintoasolidballExplode…withfire&rock(produceH2O,CO2,O2,N2,othergases)atmosphereCooldownwatera
6、ppeareddissolveharmfulgasesinto…LifebeganLifedevelopedThedevelopmentoflifeScanning1.Whatwasproducedwhentheearthexploded?2.Howdidwatercomeintobeingontheearth?3.Wheredidlifefirstbegin,onthelandorinthesea?4.Whyweremammalsdifferentfromotheranimals?1.Whatwasproducedwhe
7、ntheearthexploded?Watervapour,carbondioxide,oxygen,nitrogenandothergases.2.Howdidwatercomeintobeingontheearth?Theexplosionoftheearthproducedwatervapor,whichturnedintowaterwhentheearthcooleddown.3.Wheredidlifefirstbegin,onthelandorinthesea?Inthesea.Becausewaterdiss
8、olvedharmfulgasesandmadeitpossibleforlifetobegin.4.Whyweremammalsdifferentfromotheranimals?Becausetheyproducedtheiryoungfromwithintheirbodies.CarefulRea
