外研版（2019）选择性必修第四册Unit 5 Into the Unknown Starting out 课件

新外研选择性必修Book4

StartingoutP49Unit5IntotheunknownInthislesson,studentswill:

understandtheintroductionofmysteriesbycomprehendingthevideoaboutfournaturalphenomena;analyzeandsummarizefourunsolvedmysteries;fullyactivatelearningschemaabout“theunknown”.LearningobjectivesPre-viewingSomenaturalphenomenaarereallyamazing.Whatnaturalphenomenaareyoufamiliarwith?theearthquakethemiragethesolareclipsethunderandlightningWhatmoredoyouknowaboutthem?While-viewingWhatnaturalphenomenaarementioned?Howweretheseexplainedinthepast?Whatarethescientificexplanationsbehindthem?theearth-quakeNativeAmericansused

tobelievethatearthquakeswerecausedby

astrugglebetweenalargebird,called

the

Thunderbird,and

a

whale.

AnancientJapanese

beliefwasthatearthquakeswerecausedby

themovementsofagiantcatfishthatcarried

theworld

onitsback.Scientistsnowknow

thatearthquakesareactuallycausedbythe

movementoftectonicplates.thesolareclipseInmanycultures,there

wereancientbeliefsthatsolar

eclipseswere

causedbyacreatureeatingtheSun.In

Vietnam,

that

creaturewasagiantfrog,inNorway,

a

wolf,

andinChina,itwasahugedog.Infact,

solareclipseshappenwhentheMoonpasses

betweenEarthandtheSun,temporarilyblocking

the

Sun’slight.thunderandlightningInMedievalEurope,peoplethoughtthat

supernaturalforcescaused

thunderandlightning.Itwasasignofbadtimes

ahead.Modernsciencetellsusthat

lightning

is

anelectricchargemovingbetweenclouds,

or

betweencloudsandtheearth.Thunderis

a

shockwaveofsoundcausedbylightning.themirageInAncientChina,people

believedthat

thiswasactuallycausedbythe

breathofadragon.

Thesedays,peopleknow

thata“mirage”happenswhenlayersofairwith

varyingtemperaturescauselighttobend.Whatdoyouknowaboutthesemysteries?Whatotherunsolvedmysteriesdoyouknowof?Whichofthesedoyoumostwanttoinvestigate?After-viewingAtlantis

亚特兰蒂斯（传说沉没于大西洋的岛屿）Atlantisisalegendarycity,whichisdescribedintheworkoftheGreekphilosopherPlato.ThestoryofAtlantiswithitsfabulouslywealthyandadvancedcivilisationwhichwassweptintotheseatobelostforeverhascapturedtheimaginationofreadersforovertwomillennia.千周年纪念日惊人地Nazcalines

纳斯卡线：位于秘鲁纳斯卡沙漠的一组巨大地面线条和图案，由古代纳斯卡文明创作，通常被认为具有宗教或天文意义。TheNazcaLinesareacollectionofgiantgeometricpatternsandanimalshapes.DrawnIntothelandscapesofsouthernPeru,themajorityofthelinesarebelievedtobetheworkoftheNazcapeoplearound1ADto700.DesignatedaUNESCOWorldHeritageSitein1994,numerousstudiesandtheorieshavesofarnotexplainedthereasonwhythelineswerecreated.几何图案Tunguskaevent

通古斯大事件Tunguskaevent,enormousexplosionthatisestimatedtohaveoccurredat7:14a.m.plusorminusoneminuteon30June1908,atanaltitudeof5-10kilometres,flatteningsome2,000squarekilometresandcharringmorethan100squarekilometresofpineforestnearthlePodkamennayaTunguskaRiverinCentralSiberia,Russia.压扁烧焦Bl