2015-2016学年高中英语 Unit4 Earthquakes Warming up课件 新人教

•Teachingaims:•1.Trainthestudents’listeningability.•2.Trainthestudents’listeningability.•3.Trainthestudents’abilitytousetheInternettosearchforsomeusefulinformation.•4.Trainthestudents’abilitytocooperatewithothers.•Importantpoints:•Trainthestudents’speakingabilitybydescribing,talkinganddiscussion.•Difficultpoints:•Trainthestudents’listeningability.Howmuchdoyouknowaboutanearthquake?Manypeopledied…Peoplelosttheirhomes…Manythingsweredestroyed...大家一起来欣赏一首为汶川地震创作的歌曲《直到永远》•TheUnitedStatesSanFranciscoWhydoearthquakeshappen?Scientistsexplainthattheoutsideoftheearthismadeofanumberofdifferentplates.AtSanFranciscothePacificplatewhichismovingtowardsthenorthwestmeetstheNorthAmericanplate.ThePacificPlateismovingveryslowly—at5.3centimetersayear.•Sometimesthesetwoplatesstopanddonotmoveforyears.Thensuddenly,theyjumpandanearthquakeisfelt.Asaresultofthemovementoftheseplates,westAmericaneartheseahasalwaysbeenabadplaceforearthquakes.Whenthe1906earthquakehappened,thepacificplatejumped5-6metrestothenorth.PacificplateAmericanplateEurasianplateIndianplateAfricanplateAntarcticplate★SanFranciscoPacificplate↖AmericanplateSanFrancisco●Tangshan,HebeiJuly28th,1976Roadsgothugecracks.Steamburstfromholesorwellsintheground.Waterpipesweredestroyed.Housesfelldown.Brickbuildingsweredestroyed.Therailwaytracksbecameuselesspiecesofsteel.Peoplediedorwereinjured.Familieswerekilledandmanychildrenwereleftwithoutparents.Inafewseconds,alargecitylayinruins.Everythingwasdestroyed.Itseemstheworldwasatanend.Naturaldisastersoccurthroughouttheworld,andChinahasaparticularproblemwithearthquakes.Tangshanearthquakein1976isacaseinpoint.Soitisespeciallyimportanttotakestepstoreducethedamagecausedbyquakes.thepersonwhostudiesquakes.themachinetorecordseismicwaves.theinventorofthe1stseismologySeismologist:Seismometer:ZhangHenginHanDynasty:thestudyofQuakerecordingsSeismology:1.Talkaboutabigearthquakethathappenedintheworldwithyourpartner.2.Learnthenewwordsandphrasesfortheunit.HOMEWORK