Unit 5 Period 7 Viewing Workshop 课件 高中英语新北师大版必修第二册（2023~2024学年）

北师大必修第二册Unit5(

英语

)ENGLISHViewingWorkshopHowBigistheUniverse?新课导入BrainstormingWhenitcomestouniverse,whatdoyouknowaboutit?universestarsplanetsvastnessinfiniteness…………1.能通过观看视频，了解宇宙相关信息；2.能学会表达和总结自己对于宇宙大小的理解。课堂学习ActivateandShareWhatdoyouknowabouttheuniverse?Completethequizwiththerightnumbers?13.8billion 93billion 46billion1.Theuniverseisabout__________yearsold.2.Theobservableuniverseisabout_________lightyearsacrossindiameter.3.Todaythedistantobjectslikestarsthatwecanobserveareabitmorethan____________lightyearsaway.1ViewandLearnWatch

thefirstpartofthevideo.CheckyourpredictionsfromActivity1.213.8billion 93billion 46billion1.Theuniverseisabout__________yearsold.2.Theobservableuniverseisabout_________lightyearsacrossindiameter.3.Todaythedistantobjectslikestarsthatwecanobserveareabitmorethan____________lightyearsaway.13.8billion93billion46billionWatchtherestofthevideo.Completethetable.3QuestionsObservableUniverseWholeUniverse1.Howbigisit?2.Isthereanedge?3.Isthereacentre?4.Isitgettingbigger?Theobservableuniverseisabout93billionlightyearsacrossindiameter.Infinite.Yes.Temporaledge.No.Yes.Earth/You.No.Yes.Yes.Watchthewholevideoagain.Discussthequestions.41)WhatistheEarthcomparedto?Isthecomparisonusefulinunderstandingtheinfinitenessoftheuniverse?2)Whatmethodsdoesthepresenterusetoenableviewerstounderstandthispieceofknowledgeinphysics?ThesizeoftheEarthwithintheobservableuniverseisroughlyequivalenttothesizeofaviruswithinthesolarsystem.Thatdoesnothelpmuch,becausewecannotreallyappreciatetheincomprehensiblesmallnessofavirusnorthebewilderingbignessofoursolarsystemeither.Thepresenterprovidescomparisonsthatarerelativetoourknowledge.ExpressYourself5Whathaveyoulearntaboutthesizeoftheuniverse?Findmore