高中英语第1单元word power课件牛津版选修8.ppt

wordpower whoisshe abeautynamedchang eonthemoon thestoryaboutchang etoldusthatwehumanbeingshadbeendreamingoftravelingtospaceforthousandsofyears space universebeyondtheearth satmosphereinwhichallotherplanetsandstarsexist theearth thesun themoon satellite artificialsatellite solarsystem orbit man made vocabularyextension spaceexploration space exploration launchpad rocket launchtower spaceshuttle astronauts spacestation spacesuit spacewalk wordsrelatedtospace wordsrelatedtoexploration howcanasatellitebesentintospace isiteasytobecomeanastronaut howmuchdoyouknowaboutspaceexploration universe star planet earthmarsjupiter solarsystem galaxy man made satellite rocket spacestation spaceship astronaut thelaunchofshenzhouvi chinahassenttwoastronautsintospacethisyear theshenzhou vispacecrafthasbeensentintoorbitinthesecondhalfofthisyear itcarriedtwoastronautsandstayedinspaceforseveraldays thetwoastronautsonthemissionconductedscientificexperimentsintheorbitcapsuleofthespacecraftduringthespaceflight buttherewerenoplansforspacewalksorotheractivitiesoutsidethespacecraft theprocessofspaceexploration thefirstartificialsatellitewaslaunched peoplecouldorbittheearthin1961 photosaretakenandsamplesarecollectedfromtheplanet earth ofcourse canbestudiedwithouttheaidofspacecraft neverthelessitwasnotuntilthetwentiethcenturythatwehadmapsoftheentireplanet picturesoftheplanettakenfromspaceareofconsiderableimportance orbit 149 600 000kmfromsundiameter 直径 12 756 3kmmass 质量 5 972e24kg earthisthethirdplanetfromthesunandthefifthlargest placingasatelliteintoorbitrequiresalargeamountofenergy whichmustcomefromthelaunchvehicle ordevicethatlaunchesthesatellite thesatelliteneedstoreachanaltitudeofatleast200km 120mi andaspeedofover29 000km h 18 000mph toliftintoorbitsuccessfully satellitesreceivethiscombinationofpotential 势能 energy altitude andkinetic 动能 energy speed frommultistagerocketsburningchemicalfuels apolloelevencountdown arocketlaunchcountdown acommonsoundinthenineteen sixties butthiswasnotjustanotherlaunch itwasthebeginningofanhistoricevent itwasthecountdownforapolloeleven thespaceflightthatwouldcarrymentothefirstlandingonthemoon two and one halfminutesaftertheapolloelevenlaunch thefirst stagerocketseparatedfromthespacecraft twelveminuteslater thespacecraftreachedorbit itsspeedwastwenty nine thousandkilometersanhour itsorbitwasone hundred sixty fivekilometersabovetheearth thiswasthetimeforthecrewtotestallthespacecraftsystems everythingworkedperfectly so thenasaflightdirectortoldthemtheywere go forthemoon theyfiredthethird stagerocket itincreasedthespeedofthespacecrafttoforty thousandkilometersanhour thiswasfastenoughtoescapethepulloftheearth sgravity apolloelevenwasonitswaytothemoon inseventy sevenhours ifallwentwell apolloelevenwouldbethere onjuly20 1969 americanastronautedwin buzz aldrin jr pictured becamethesecondpersontowalkonthemoon aldrinsteppedontothemoonshortlyafterfellowapollo11astronaut neilarmstrong whilemillionsofpeopleonearthwatchedatelevisedbroadcastoftheevent armstrongandaldrinspenttwohoursexploringthelunarsurface gatheringsamples takingphotos andsettingupexperiments iwanttocollectsomesamplesfromthemoon oneofanumberofthings orpartofawholething whichcanbelookedattoseewhattherestislike spaceship spacecraft spaceshuttle spacestation space spacesuit spacewalk astronaut spaceman spacewoman spaceexploration a personwhotravelsinouterspace b largemannedartificialsatelliteusedasabaseforoperationsinspace e g forscientificresearch c vehiclemannedorunmannedfortravelinginspace d sealedsuitcoveringthewholebodyandsuppliedwithair allowingthewearertomoveaboutinspace e mannedspaceshipdesignedforrepeateduse e g betweenearthandaspacestationorthemoon f theexplorationofspace travelingintospaceinordertolearnaboutit g actionofmovingaboutinspaceoutsideaspacecraft explanation h universebeyondtheearth satmosphereinwhichallotherplanetsandstarsexist iguesssomeofyouaredreamingofbecomingan andtravellingto tocarryout ifthiscomestrue you llprobablytravelby aspaceshipthatlookslikeanaeroplane two supportedbyalaunchtowerwillliftthespaceshuttleintospace sometimeaftertherocketsandthespaceshuttleare therocketswillseparatefromthespaceshuttleandfallintothesea thenashipwillpickthemup astronautswilldotheirresearchinabaseinouterspacecalled sometimestheygooutoftheirspaceshuttletotakea inouterspaceastronautscannottakeofftheir whichprotectthemandprovideoxygen in1965 alexeileonovfromtheformersovietunionbecamethefirsthuma