UsingLanguageⅡ.ppt

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1、Unit4Astronomy:thescienceofthestarsStephenHawkingbornin1942斯蒂芬·藿金是当今科学界的一位传奇人物。这不仅仅因为他是一位被誉为继爱因斯坦后最著名的科学思想家和最杰出的理论物理学家，还在于他是在常人无法想象的身体状况下进行研究和创造性工作的。blackhole黑洞黑洞并非只是吞噬物质。除了会在星系形成的过程中扮演重要角色外，在经过一段相当漫长的时间后，黑洞也会把一些曾被它吸入的物质信息向外界释放出来。Nowwe’regoingtolistentoatalkaboutthetheo

2、riesofgravity.Listencarefullyandtrytogetthemainideaofit.ListeningAThetextisabouthowthreescientistswantedtofindoutaboutthebeginningoftheuniverse.BThetextisabouthowtheideaofgravityhasdevelopedoveralongperiodoftime.CThetextisabouttheimportanceofthreescientistsandtheirwork.

3、Choosethebestsummary.SummaryBiscorrectbecauseitgivesaclearideaofwhatthelisteningpassageisabout.SummaryAisnottrue.Thethreescientistswantedtoexplainhowtheuniverseworkedandnothowitbegan.SummaryCistoogeneralanddoesnotgiveenoughdetailaboutwhatthelisteningpassageisabout.Liste

4、ntothetapeagainandfillinthechart.IsaacNewtonAlbertEinsteinStephenHawkingIdeaLargebodieshaveaforcewhichpullsthingstowardsthem.Inspacelargeobjectsmakespaceandtimebend;thelargertheobject,thefurtherspaceandtimebend.Blackholeshaveaverylargemassandpullthingstowardsthem.IsaacN

5、ewtonAlbertEinsteinStephenHawkingDevelopmentThebiggertheobjectthestrongerthegravity.Timegoesslowerinverystronggravity.Ifyougoovertheedge,youcannotgetout;butifyoudonot,youmaybeabletoescape.spacewalkLookatthepictures!1.Thepullofgravitybecameverystronghelefttheearth’satmos

6、phere.Hisweightisnormal.2.Itdisappearedwhenhewasinspace.Heisweightless.3.Itwasverylightwhenhewasonthemoon.Heweighslessthanonearth.HomeworkCollectpassagesaboutgravity.Prepareforspeaking.