英语公开课优质课件推选——how,life,began,on,the,earth

Unit4Astronomy thescienceofthestars Weliveonthesameplanet theearth 1 Doyouknowtheoriginoflifeonearth 2 Eachreligionorculturehasitsownideasabouthowlifebeganonearth InChineseculture separates 分 theskyfromtheearth Pangu盘古 sky earth madehumanbeings Nuwa 女娲 Inwesterncountries createdtheworldandalllivingthings God 上帝 Doyouknowwhatascientificideais BackgroundknowledgeTheBigBangisthetermusedtodescribeahugeexplosionthatscientistsbelievehappenedabout15billionsyearsago NobodyknowswhatcausedtheBigBang Butitwastheeventthatcreatedouruniverse TheBigBang Pre reading TheuniversebeganwithaBigBang While reading ReadthepassageonP25quickly andmatchtherightmainideaofeachparagraph Howmanypartscanthetextbedividedinto Step1 Fastreading Howlifebeganontheearth Para 1Para 2Para 3Para 4Para 5 Atheoryabouthowtheuniversewased Theation 形成 oftheearth Theimportanceofwaterforlife Thedevelopmentofplantsandanimals Thearrivalofhumansandtheireffectsontheearth Part1 Thedevelopmentoftheearth Part2 Thedevelopmentoflife 2 DetailedReading Part1 1 3 Thedevelopmentoftheearth Part1 para1 3 Thedevelopmentoftheearth 1 AftertheBigBang whathappened 2 Whathappenedtothesolidglobenext 3 Whatdidthewatervapourandgasesweretomake 4 Whatappearedaftertheearthcooleddown 5 Whatdidthewaterdo Howdidtheearthcomeintobeing 1 AftertheBigBang whathappened acloudofdust aviolentsolidball Settledinto explodedwithfireandrock producedwatervapourandgases 2 Whathappenedtothesolidglobenext Intime 3 Whatdidthewatervapourandgasesweretomake theearth satmosphere Waterappearedonitssurfacewhichisimportantforthebeginningoflifeontheearth 4 Whatappearedaftertheearthcooleddown 5 Whatdidthewaterdo Itallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas acloudof BigBang asolid slowlycombine theearth down itexplodedloudlywith and water theearth s dust ball globe firerock atmosphere cooled Howdidtheearthcomeintobeing 产生 Accordingtothepictures haveatrytoretellthedevelopmentoflife Acloudofenergeticdust Asolidball Atmosphere Aworldfullofwater 4 1 3 2 dissolveharmfulgases Part2 4 5 Thedevelopmentoflife Part2 para4 5 Thedevelopmentoflife Readpara4carefullyandmakeatimelineofthedevelopmentoflife water 1 2 10 3 4 insects onland 5 6 7 8 dinosaurs onland 9 11 small inwater andallsortsoffish greenplantsonland onlandandinwater forests onland onland smallcleveranimalswith plants shellfish amphibians reptiles mammals handsandfeet 1 atimelineofthedevelopmentoflife thecleverestanimals Thearrivalof encouragedthe ofearly Manymillionsofyearslater begantoappear Later appeared Somewere Otherscalled wereabletoliveonlandswellas Whentheplantsgrewintoforests appearedforthefirsttime Aftertheydisappeared becamemoreimportant Theywerethelastgroupofanimalsdifferentfrombecausethey milkfromwithintheirbodies development shellfishandallsortsoffish onland landanimals amphibians dinosaurs mammals produced smallplants thefirstgreenplants insects inthesea Readpare5carefully findouttheanswer 1 Whatproblemiscausedbyhumanbeing Theycausedglobalwarming Step5 discussion Theearthisgettingwarmereachyear whateffectswillthishave Howtosolvethisproblem SuggestedAnswers Theearthwillbesohotthatnolifewillexist 存在 ontheearthanymore Tosolvethisproblem peopleshouldprotecttheearthcarefully Theymuststopputtingtoomuchcarbondioxideintotheair reducepollution controlthepopulationandsoon Weonlyhaveoneearth Withoutotherlivings wehumancannotlive Homework 1 Readthepassagemoreafterclass 2 Writeacompositionabouthowtostopglobalwarming ThankYou