高中英语选修九-Unit-2-Sailing-the-oceans-课件(Warming-up&re

1.集中精力于2.创纪录3.以…平均速度4.在某人十几岁时5.专心于6.在接下来的几年7.返回到8.实现某人的目标WordsandExpressionsforReadingII9.教师资格10.世界锦标11.从那以后12.从…退休13.培训，把…培养成14.对…有强烈的爱15.破纪录集中精力于focuson创纪录setarecord以…平均速度anaveragespeedof在某人十几岁时inone’steens专心于concentrateon在接下来的几年inthefollowingfewyears返回到returnto实现某人的目标achieveone’sgoalWordsandExpressionsforReadingII教师资格teachingqualification世界锦标theworldchampionships从那以后sincethen从…退休retirefrom培训，把…培养成betrainedas对…有强烈的爱haveapassionfor破纪录breakarecord(5minutes)compassAstrolabe(星盘)Sextant(六分仪)sea/nauticalchartnavigatorsearlynavigationalinstruments1.Whatisanavigator?2.Whatisthedifferencebetweenanavigatorandanexplorer?Anavigatorexploresnewroutesacrossthesea.Anavigatorexploresthesea;anexplorerdiscoversnewplacesonland.ZhengHeIsheanavigatororanexplorer?HemadesevenvoyagesduringhislifetimeandcontributedgreatlytothescienceofnavigationinChina.ZhengHeMarcoPoloJamesCookHowdoyouthinkseamanfoundtheirwaybeforemodernaccuratemethodsofnavigationwereinvented?Howdidtheynavigatesowell?Readaboutwhatnavigationwaslikebeforemoderninstrumentswereused.(25minutes)SailingtheoceansFast-readingtogetthegeneralidea.Page1(10minutes)UsingnatureKeepingalongsidethecoastlineUsingcelestialbodiesUsingwildlifeUsingtheweatherUsingthesea(1minute)Usingcelestialbodiestoplotthepositionstoworkoutthelatitudeaspecialcloudformationindicatesthereislandcloseby(2minutes)UsingwildlifeIfseaweedwasfreshandsmelledstrongly,theshipwasclosetoland.Seabirdscouldbeusedtoshowthewaytolandwhenitwasnowheretobeseen.(1minute)UsingtheweatherTohelpidentifythepositionofastreamorriverwhen…Todirecttheirsailing(1minute).Usetheinformationtoanalyzethenavigationalskillsandwritetheanswersinyourownwords.1.Tofindtheship’spositionatseaasailorused_______________________.2.Asailorknewthatlandwasnearbyifhesaw____________________________________________________.3.Sailorsused__________________________toincreasetheirspeed.theNorthStarandthesun.seacurrentsortidesandwindsUsingnatureclouds,freshseaweed,nestingbirdsorfog(5minutes)Fast-readingtogetthegeneralidea.thenanswerthequestions.Page2(10minutes)Usingnavigationalinstruments1.Findinglongitude2.Findinglatitudethecompassthebearingcircle(方位圆)theastrolabe(星盘)thequadrant(象限仪,四分仪)thesextant(六分仪)(2minutes)Readthepassageandanswerthefollowingquestions.1.Whatistheuseofabearingcircle,astrolabe,quadrantorsextant?()Whatistheuseofacompass?()A.tosetthecourseoftheshipB.tomeasurethepositionoftheshipC.tomeasurethespeedoftheshipD.totellthetimeBAUsinginstruments(2minutes)ReadagainandfillintheblanksThereweretwomethodstofindlongitude:1.__________________________2.___________________________measuringtimeandspeedcompassandcomplicatedmathematicaltablesUsinginstruments(1minute)Writedowntheworkingprinciplesofthefollowinginstruments:Bearingcircle:Astrolabe:Quadrant:Sextant:tocomparetheheightofthesunnowwiththepositionofthesunatmidday.tocomparethepositionoftheshipinrelationtosomestarsorthesun.amorepreciseformoftheastrolabe,tomeasurehowhighstarsareabovethehorizon,andcomparethatmeasurementwithpreviousmeasurements.anupdatedversionofthequadrantandsoitwasmoreaccurate,tomeasuretheanglebetweentowfixedpintsoutsidetheship.(5minutes)Homework1.Reviewthispassage.2.PreviewLearningaboutlanguage.