Unit 4 Astronomy Warming up and Reading.ppt

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1、WelcomeUnit4Astronomy:thescienceofthestarsWarmingup,Pre-readingandReadingAsweknow,inoursolarsystemeightplanetscirclearoundthesun.Whatarethey?Warming-upMercuryVenusEarthMarsJupiterSaturnUranusNeptuneEarthCommonItisoneoftheplanetsinthesolarsystemlikeothers.Whyistheearthspecial?Becauseitistheo

2、nlyplanetonwhichlifeexists.ShellfishandotherfishPlantsInsectsAmphibiansReptilesMammalsAnimalswithfourlegsandfeetHumansWeallliveontheearth,butdoyouknowhowlifebeganontheearth?Pre-readingInChineseculture…____________separates(分)theskyfromtheearth.Pangu盘古skyearth_____________madehumanbeings.Nǚw

3、a(女娲)God(上帝)Inwesterncountries:______________createdtheworldandalllivingthings.HowLifeBeganOnTheEarthReadingReadthepassagequicklyandmatcheachparagraphwithitsmainidea.Para.1TheformationoftheearthPara.2AwidelyacceptedtheoryabouttheformationoftheuniversePara.3TheimportanceofwaterforlifePara.4T

4、hearrivalofhumansandtheirimpactontheearthPara.5ThedevelopmentofplantsandanimalsontheearthSkimmingPuttheeventsintoatimeline.Insectsandamphibiansappeared.Dinosaursappeared.Theearthbecameasolidball.Smallplantsgrewontheearth.Reptilesappeared.Plantsbegantogrowondryland.Theearthwasacloudofdust.Wa

5、terappearedontheearth.Shellfishandotherfishappeared.Theuniversebeganwitha“BigBang”.Cleveranimalswithhandsandfeetappeared.Mammalsappeared.Keys:107384615212911ScanningFillintheblankswiththeproperwords.Afterthe_________,theearthwasacloudof_________.Laterthedustbegantocombineinto____________.An

6、dthenit________loudlywithfireandrock,whichwereintimeto_______carbon,nitrogen,watervapor,dioxideandothergaseswhichweretomaketheearth’s___________.Astheearth_______down,_____beganto_______onitssurface.Waterhad____________fromplanetsorsatellites,butit_________ontheearth.Thatmadeitpossibleforli

7、fetobeginto________.dustexplodedproducecooledappeardisappearedremaineddevelop“BigBang”asolidglobeatmospherewaterCarefulreadingGlobalwarmingTheeffectsofglobalwarming2.Risingsealevelswillleadtocoastalflooding.5.Manyplantsandanimalspecieswilllosetheirhabita