高中英语 必修三 unit4 reading 课件.ppt

《高中英语 必修三 unit4 reading 课件.ppt》由会员上传分享，免费在线阅读，更多相关内容在PPT专区-天天文库。

1、Unit4Astronomy:thescienceofthestarsPara.1Para.2Para.3Para.4Para.5A________abouthowtheuniversewasformedThe__________oftheearthTheimportanceof______forlifeThe_______________ofplantsandanimalsThearrivalof_________andtheireffectsontheearththeoryformationwaterdevelopmenthumansHowlifebeganontheea

2、rthBeforelifeappeared.Differentlivesdeveloped.Part1(para1~3)BeforelifeappearedAccordingtoawidelyacceptedtheory,howdidthestarsform?Howdidtheearth’satmosphereform?Whywastheearthdifferentfromtheotherplanets?Whatarolethewaterplayedinthedevelopmentoflife?1.Accordingtoawidelyacceptedtheory,howdid

3、thestarsform?2.Howdidtheearth’satmosphereform?Theuniversebeganwitha“BigBang”thatthrewmatterinalldirections,thenatomsbegantoformandcombinetocreatestars.Theearthwassoviolent.Itexplodedloudlywithforeandrocktoproducecarbon,nitrogen,watervaporandothergases,whichweretomaketheatmosphere.3.Whywasth

4、eearthdifferentfromtheotherplanets?4.Whatarolethewaterplayedinthedevelopmentoflife?Becausethewateronotherplanetshaddisappearedlater.Thepresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.ThisproduceachainreactionwhichmadeitpossibleforlifetodevelopTheearthwasjust

5、acloudofdustwhosefutureis_________afterthe“BigBang”.Thenthedustbegantosettleintoa_______ballwhichisso________and_______loudlywithfireandrock,tobeintimetoproducemanythings,whichmaketheearth’s___________.Astheearthcooleddown,________begantoappearandpeoplethinkitisimportantforthebeginningoflif

6、e.Itallowedtheearthtodissolve________gases.Thenlifebegantodevelop.uncertainsolidviolentexplodedatmospherewaterharmful︶︶︵Ifeltlonelyandlifewasdullatthattime.Part2(para4~5)Howthelifedeveloped1.Makeatimelineofthedevelopmentoflife2.Whydidtheplantsgrowbeforetheanimalscame?3.Whyisitwronginfilmsan

7、dstoriestoshowdinosaursandpeopletogether?1.2.3.4.5.6.smallplantsOnsurfaceofwaterEarlyshellfishandallsortsoffishgreenplantsonlandlandanimalsinsects(onland)amphibian(onlandandinwater)Mammals---cleveranimalsforestsreptiles(hugeanimal--dinosaurs)3.Whyisitwro