高一英语 book3 unit4 astronomy学案3 人教新目标

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1、Unit4Astronomy：thescienceofthestarsNO_3__教师寄语：Neverputoffwhatyoucandotodayuntiltomorrow.今日事今日毕！HowlifebeganontheearthⅠFastreadingⅰ．Whatisthepassageabout?ⅱ．Puttheorderofdevelopmentoflifeintoatimeline.A.Insectsandamphibiansappeared.B.Theearthbecameasolid

2、ball.C.Reptilesappeared.D.Theearthwasacloudofdust.E.ShellfishandotherfishappearedF.Dinosaursappeared.G.Smallplantsgrewonthewater.H.Plantsbegantogrowondryland.I.Waterappearedontheearth.J.Mammals(includinghumans)appeared.Therightorder:ⅲMultiple-choice1.W

3、hywastheearthdifferentfromotherplanets?AItproducedalotofheat.B.Thewaterremained.CWaterdisappeared.D.Itwastheoldestplanet.2.Whywaslifeabletodevelopontheearthbutnotonotherplanets?ATheearthhadasolidshape.B.Theearthdidnothaveharmfulgasesinitsatmosphere.CTh

4、ewaterstayedontheearthbutnotonotherplanets.D.Theearthwasnottoohotandnottoocold.3.Whydidtheplantsgrowbeforeanimalscame?AAnimalsneededplantstoprotectthemfromthesun.BPlantsprovidedoxygenforanimalstobreathe.CAnimalscouldhidefromhuntersinforest.DItwaseasier

5、forplantstogrow.4.Whatproblemiscausedbyhumanbeings?ATheyexisteverywhereontheearth.BTheycauseglobalwarming.CTheyfindnewmethodsofgrowingcrops.DTheyenjoyhuntingandfishing.Ⅱ.ClosereadingⅰReadthetextandmatchthemainideaofeachparagraph.Paragraph1:a.Theimporta

6、nceofwaterforlifeParagraph2:b.ThedevelopmentofplantsandanimalsontheearthParagraph3:c.TheformationoftheearthParagraph4:d.AwidelyacceptedtheoryabouttheformationoftheuniverseParagraph5:e.Thearrivalofhumansandtheirimpactontheearthⅱ.Answerthequestions1.What

7、wasthereontheearthbeforelifecouldbegin?2.Whydoscientiststhinktherehasneverbeenlifeonthemoon?3.Whydidanimalsfirstappearintheseas?4.Whydidgreenplantshelplifetodevelop?5.Whyweremammalsdifferentfromotheranimals?6.Howdidwatercomeintobeingontheearth?ⅢTransla

8、tephrases:1.一个广为接受的理论______________________2.向四面八方_______________3.及时，最后__________4.对….是基本的__________________5.水的长期存在_________________6.连锁反应___________________7.各种各样的鱼_______________8.第一次_______________9.产卵__________10.产生，分娩____________