高中英语：Unit4 Astronomy the science of the stars课件（新人教版必修3）.ppt

welcometomyenglishworld step1leadin lookattwopictures trytogiveasmuchinformationaspossible unit4astronomy thescienceofthestars step2warmingup doyouknowhowmanyplanetscirclearoundthesuninoursolarsystem whatarethey canyoumatchthenameswiththeplanets jupiter uranus neptune saturn mercury mars earth venus 水星 金星 地球 火星 木星 土星 天王星 海王星 step3aquiz what stheendoftheworld it s d what sthebeginningoftheworld it s w step4pre reading eachreligionandculturehasitsownideasabouthowlifebeganonearth whatdoyouknow inchina weallknowthatpanguseparatestheskyfromtheearth thegoddessnvwamendedtheheavenandcreatedhumanbeings inwesternculture godcreatedtheworldinsixdays panguseparatestheskyfromtheearth nvwamakeshumanbeings godcreatedman 上帝造人 whatisthepassageabout step5reading howlifebeganontheearth while reading task1listenandmatch listentothetapeofthereadingpassageandmatchthemainideaforeachparagraph mainideaofeachparagraph theimportanceofwaterforlifethedevelopmentofplantsandanimalsontheearththeformationoftheearthd awidelyacceptedtheoryabouttheformationoftheuniverse d c a b e thearrivalofhumansandtheirimpactontheearth paragraph5 paragraph1 paragraph2 paragraph3 paragraph4 e while reading task2 scanning workinpairs puttheorderofdevelopmentoflifeintoatimelineaccordingtothereadingpassage puttheorderofdevelopmentoflifeintoatimeline insectsandamphibiansappeared theearthbecameasolidball reptilesappeared theearthwasacloudofdust shellfishandotherfishappeareddinosaursappeared smallplantsgrewonthewater plantsbegantogrowondryland waterappearedontheearth mammals includinghumans appeared d b i g e h a c f j while reading task3 closereading thinkaboutwhatyouhavereadandmakechoices whywastheearthdifferentfromotherplanets aitproducedalotofheat b thewaterremained cwaterdisappeared d itwastheoldestplanet whywaslifeabletodevelopontheearthbutnotonotherplanets atheearthhadasolidshape b theearthdidnothaveharmfulgasesinitsatmosphere cthewaterstayedontheearthbutnotonotherplanets d theearthwasnottoohotandnottoocold ks5u精品课件 whydidtheplantsgrowbeforeanimalscame aanimalsneededplantstoprotectthemfromthesun bplantsprovidedoxygenforanimalstobreathe canimalscouldhidefromhuntersinforest ditwaseasierforplantstogrow whatproblemiscausedbyhumanbeings atheyexisteverywhereontheearth btheycauseglobalwarming ctheyfindnewmethodsofgrowingcrops dtheyenjoyhuntingandfishing ks5u精品课件 step6lookingandthinking lookatthefollowingpicturesandtrytounderstandmoreofthereadingpassage acloudofdust asolidglobe explode atmosphere water cellsseparate plantsinthewater earlyshellfishandfish plantsonland oxygen insectsandamphibians reptiles dinosaurs mammals manhadevolvedfromapes thedevelopmentoflife asastudent whatlittlethingscanwedofortheearth step7discussion topreventtheearthfromgettinghotterandhottertoslowdowntheproblemgettingworse wehaveonlyoneearth weshouldtakecareoftheearth ks5u精品课件 whetherlifewillcontinueontheearthdependsonhumanbeings onlyifwecarewillwehelp onlyifwehelpshallallbesaved step8homework 1 readaloudthereadingpassageandunderlinetheusefulphrasesandsentencepatterns 2 finishoffex1andex2onp 28 goodbye step5summingup howlifebeganontheearth 1 smallplantsinwater 2 shellfishandallsortsoffish 3 greenplantsonland 4 insects onland 5 amphibians onlandandinwater 6 forests 7 reptiles onland 8 dinosaurs onland 9 mammals onland 10 smallcleveranimalswithhandsandfeet 11 humans whatsubjectsdoyoulearnatschool chineseenglishmathematicsphysicshistory geographyphysicsbiologychemistry brainstorming geophysics biochemistry task3 carefulreading 1 whatwasthereontheearthbeforelifecouldbegin watervapour carbondioxide oxygen nitrogenandothergases 2 whydoscientiststhinktherehasneverbeenlifeonthemoon becausethereisnowateronthemoon 3 whydidanimalsfirstappearintheseas becausewaterallowedtheearthtodissolveharmfulgasesintotheoceansandseas 4 whydidgreenplantshelplifetodevelop becausegreenplantscantakecarbondioxidefromtheatmosphereandfilltheairwithoxygen 5 whyweremammalsdifferentfromotheranimals theyweredifferentbecausetheyproducedtheiryoungfromwithintheirbodies 6 howdidwatercomeintobeingontheearth theexplosionoftheearthproducedwatervapor whichturnedintowaterwhentheearthcooleddown waterairlife istheheadspringoflife howlifebeganontheearth water madeitpossibleforlifetobegintodevelop water plantsencouragedthedevelopmentof earlyshellfishandallsortsoffish later appeared landanimals insects amphibians w