unit 4 astronomy

《unit 4 astronomy》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit4Astronomy:thescienceofthestarsWarmingUpWheredowelive?海王星Saturn水星Uranus金星Venus地球Earth火星Mars木星Mercury土星Jupiter天王星NeptuneHowLifeBeganontheEarthReadingListentothetapeandfinishthe5questions.1.Howwerestarsandotherbodiescreated?A.Atomscombinedtocreatethem.B.Cloudsofdustcombined

2、tocreatethem.C.Watercombinedtocreatethem.2.Whichisthemostimportantforlifeappearingontheearth?A.FireB.RockC.Water3.Itcanbeknownfromthepassagethat()A.PlantsappearedlaterontheearththananimalsB.Earlyshellfishappearedearlierthanplants.C.Animalsappearedlaterontheearththanplants.4.H

3、owmanyyearsdiddinosaursexistontheearth?A.Morethan140billionyears.B.Morethan140millionyears.C.Morethan140thousandyear.5.Whycantheearthbecometoohottoliveon?A.Smallcleveranimalsproducemoreheat.B.Smallcleveranimalsproducetoomuchcarbondioxide.C.Smallcleveranimalsdon’twantheattoesc

4、apefromtheearth.CloseReadingI.Readthepassagecarefullyandwritedownthemainideaforeachparagraph.Para.1Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.2Theformation(形成)oftheearth.Howdidtheearthform?1.Acloudofdust2.Asolidglobe.3.Explodedwithfireandrock.4.Producecarbon,nit

5、rogen,watervapourandothergases.5.Theearth’satmosphere.Para.3Theimportanceofwaterforlife.Para.4Thedevelopmentofplantsandanimalsontheearth.Theorderoflifeforms1.Plantsinthewater2.Shellfishandfish3.Plantsonland4.Insects﹠amphibians5.Reptiles6.Dinosaurs7.MammalsPara.5Thearrivalofhu

6、mansandtheirimpactontheearth.Ⅱ.Putthefollowingsentencesintorightorder.1.Insectsandamphibiansappeared.3.Theearthbecameasolidball.5.Reptilesappeared.7.Theearthwasacloudofdust.9.Shellfishandotherfishappeared.11.Cleveranimalswithhandsandfeetappeared.2.Dinosaursappeared.4.Smallpla

7、ntsgrewonthewater.6.Plantsbegantogrowondryland.8.Waterappearedontheearth.10.Theuniversebeganwitha"BigBang".12.Mammalsappeared.Order:107384961521211Ⅲ.Discussthefollowingquestionswithyourpartners.Whywastheearthdifferentfromotherplanets?Thewaterremained.2.Whydidtheplantsgrowbefo

8、retheanimalscame?Becauseplantsprovideoxygenforanimalstobreathe.3.Wha