高中英语必修三第四单元完整ppt课件

.1、unit 4、astrontomy : thescience ofthestars、howmuchdoyouruttheverse？whatrethenamesoftheitplantsthacircleurson？Whatistheirorderfromthesun？地球_ _ _ _ _ _ _ _木星_ _ _ _ _火星_ _ _ _ _ _ _水星howoldistheuniversity？2.Howoldistheearth？3.whichwerethefirstcrefeatureorplantsonearth？4.doyouknowwhheorderforthedevelopmentfplantsandanimalsis？sever albillionyears ago、between 4.5 and 3.8 billion years ago、very smallair-breakthing creatures、free talk、6，ideasabout thowlifebegan，7、reading、Howlifebeganontheearth、fastreading、readdpassagequicklyandfindthemainidea、abriefintrodutiononhidea，Careful reading，para 1:para 23360 para 3360 para 4:para 53360，awideaptedtheoryabouttheformationoftheves、Theimportanceofwaterforlife、thedevelopmentfplantsandanimalsontheearth、thearrivativemanumansandtheirimpactontheearth、Reathepassagecarefullyandanalysestructure、earth、atmosphereandwater、life development、human beings、1 . whatistructure2.whydidscientistsbelievewater fundamentaltothedevemenoflife？3.how didwater comeintobeingontheearth？4.whichkdindoflife-beingfirstapparedontheearth，plantsoranimals？为什么？5.whyweremalsdifferentfromallifeformsinthepast？answerhemollowing gquestions、carbon、nitrogen、water vapour、andothergases。2 . whydidscientistbelieveversfundamentaltedevemenoflife？bechmadeitpossibleforlifetdevelop、whatistheoriginalpassandacoidsintotheoceansandseastoensureafollowingchainreaction、3 .how didwater comeintobeingontheearth？theexplosionoftheearthroducedwatervapor、whichturrenedintwater whentheearthbooleddos、4。whichkdindoflife-beingfirstapparedontheearth，plantsoranimals？为什么？at first、smallplantsbegantoapplearontfromallifeformsinthewater、theyproduceoxygen、whichencouragedthelaterdevelopater，theyweredifferentbecusetheyprodedheiryoungfromwitheirbodies sandproductofeedthem。()1 insertsandamphibianssapeared。()2 dinosaurs appeared。()3 theearhbecmesolidball。()4 smallplantsgrewonthewater。()5 reptiles appeared。()6 plantsbegantogo Nd ryland。()7 theearthwas waloudofdust。()8 waterappearedontheearth。(9 shellsfish otherfisherreared。()10 theuniversity ebeganwitha“big bang”。()11 cleveranimalswith Handsandfeetappeared。()12 mammals appeared，8，7，5)，6，4，1，10，3，9，2，puttheorderofdevelopmentflife、After the“big bang”、theearthwafulofwater、original cellsapieredintranen。thecellsinthewaterbegantoseparame . smallplantsameintbeing .18，Earyshellfishandallsortsoffish，some animals(请参阅、24、Wearemakingtheworldbetter、wearemakingtheworldworse、discussion、25，because etheyareputtingtoomuchcarbondioxidinttheatmosphere。Theearthaybecometohottoliveon。26，theearthwhisbecominghotteradandhotter！solar energy、plant trees、recycle rubbish、preventdescription、save water、purify air、whatcanwedotakatakecreftheearth，28，whetherlateillcontinueontheearhdependsonhumanbeings，29，精密拨号，Theearhbecmesoviolentthat itwastearwhethertheshapewouldllastornot . whatmostanyscientistsb