山西省阳泉市荫营中学高考英语Unit4HowLifeBeganOnTheEarth复习教案新人教版learningaims:Learnhowtousedifferentreadingskillsfordifferentreadingpurposes,(inferring;skimming;detailedreading,andsoon.)Difficultandimportantpoints:Developourreadingability.Learnthefollowingwordsandphrases:theory;violent;unlike;harmful;mutiply;exist;intime;layeggs;givebirthto;inone’sturn;prevent…from.Reading:HowlifebeganontheearthI.Skimming(略读)Readingstrategy(策略):Gothroughthepassagequicklytogetthemainideaofeachparagraph.Don’tworryaboutthedetailsandnewwords.Skimthepassageandmatchthemainideawitheachparagraph.Para.1Theformation(形成)oftheearthPara.2TheimportanceofwaterforlifePara.3AwidelyacceptedtheoryabouttheformationoftheuniversePara.4ThearrivalofhumansandtheireffectsontheearthPara.5ThedevelopmentofplantsandanimalsontheearthII.Detailedreading(细读)Readingstrategy:Readthepassagecarefullyparagraphbyparagraghandtrytogetmoreinformation.Thenanswerthequestions.Para1&2:theformationoftheuniverseandtheearth1.Abouthowtheuniversebegan,whichtheoryiswidelyaccepted?2.Whatform（形状）wastheearthafterthe“BigBang”?3.Whatmadeuptheearth’satmosphereaftertheearthexploded?4.Inthesentence“Itexplodedloudlywithfireandrock.Theywereintimetoproducecarbon,nitrogen…”here“they”refersto__________.“Intime”means_______.Para3theimportanceofwaterforlife•Whatmadetheearthdifferentfromtheotherplanetsisthat________remainedontheearth.•Thesignificance(意义)ofthecontinuedpresenceofwateristhatitallowed________________________.Para4ThedevelopmentoflifePara5thearrivalofhumansandtheireffectsontheearth1.Whatproblemshavebeencausedbyhumanstotheearth?2.Whatdoesthelastsentencemean?III.Fromthetext,wecaninfer（推断）exceptthat___.A.Thepassagetellsusthescientificideaofhowlifebeganontheearth.B.Itiswrongtoshowfilmswithdinosaursandpeopletogether.C.Finally,humansruletheworld,buttheyarenottakingcareoftheearthverywell.D.Lifebeganonlandandtheninwater.IV.CanyoufindtheirEnglish?1.smallplantsinthewater3.____________4.insectsonland5._____________6._________2._________2._________7.___________8.dinosaurs9＿＿＿.____1.随后他会变成什么一直无法确定,直到约45亿至38亿年,这团尘埃最终变成一个固体圆球.2.地球变得如此激烈动荡,以致于不知道这个形状是否会继续存在下去.3.更重要的事，随着地球的冷却，地球的表面就开始出现了水。4.很多科学家相信,水的继续存在使地球得以把有害气体和酸的物质溶解到海洋里.V.TalkingbarHowtoprotecttheearthandmakeitabetterplacetoliveon?VI.Homework.•Learnandrecitethefoursentencesabove•Retellthepassageabouthowlifebeganontheearth.Learntheusefulwordsandexpressionsbyheart.
