内蒙古准格尔旗世纪中学人教新课标高中英语必修三Unit 4 Astronomy the science of the stars 课件1
38页1、Unit4Astronomy thescienceofthestars Warmingup medicinebiologychemistry astronomyphysicsmathematics geophysicsgeologyphysics biochemistrybiologychemistry Astronomyisthescientificstudyoftheuniverseandtheheavenbodies suchasthesun themoon andstars gas anddustwithinit astronomer Solarsystem 1 Doyouknowhowdidtheuniversebegin Eachreligionorculturehasitsownideasaboutthebeginningoftheuniverse Pre reading Panguseparatestheskyfromtheearth Panguseparatestheskyfromtheearth Panguseparatedtheearthandskywithana
2、x Afterhedied hisbreathbecamewindandcloud hisvoicebecamethunderandhislefteyesunandrightonemoon armsandlegsbecameedgesandmountains bloodbecameriversandtendon 筋脉 becameroads musclesbecamefieldsandhairstars teethandbonesbecamemetals pearlsandjade sweatbecamerain Reading HowLifeBeganontheEarth Doyouknowtheoriginofthehumanbeings Manhadevolvedfromapes Earth Howlifebeganontheearth TheBigBang water Plantsinthewater Shellfishandfish Plantsonland Insectsandamphibians Reptiles Dinosaurs Mammals water green
3、plantsonland 2 34 Howlifebeganontheearth Analysing 5678 forests shellfishandallsortsoffish insects onland amphibians onlandandinwater reptiles onland dinosaurs onland mammals onland smallcleveranimalswithhandsandfeethuman smallplantsinwater 1 AcloudofdustCombineintoasolidballExplode withfire rock produceH2O CO2 O2 N2 othergases atmosphere Cooldown waterappeared dissolveharmfulgasesinto Lifebegan Lifedeveloped Thedevelopmentoflife Scanning 1 Whatwasproducedwhentheearthexploded 2 Howdidwatercomein
4、tobeingontheearth 3 Wheredidlifefirstbegin onthelandorinthesea 4 Whyweremammalsdifferentfromotheranimals 1 Whatwasproducedwhentheearthexploded Watervapour carbondioxide oxygen nitrogenandothergases 2 Howdidwatercomeintobeingontheearth Theexplosionoftheearthproducedwatervapor whichturnedintowaterwhentheearthcooleddown 3 Wheredidlifefirstbegin onthelandorinthesea Inthesea Becausewaterdissolvedharmfulgasesandmadeitpossibleforlifetobegin 4 Whyweremammalsdifferentfromotheranimals Becausetheyproducedt
5、heiryoungfromwithintheirbodies CarefulReadingFinishthecomprehendingonpage27 Thinkaboutwhatyouhavereadandmakechoices Whywastheearthdifferentfromotherplanets Aitproducedalotofheat B Thewaterremained CWaterdisappeared D Itwastheoldestplanet Whywaslifeabletodevelopontheearthbutnotonotherplanets ATheearthhadasolidshape B Theearthdidnothaveharmfulgasesinitsatmosphere CThewaterstayedontheearthbutnotonotherplanets D Theearthwasnottoohotandnottoocold Whywasitnecessaryforplantstogrowbeforeanimals AAnimals
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