英语ⅲ外研版module3 theviolenceofnature-function教案1
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英语ⅲ外研版module3 theviolenceofnature-function教案1
FUNCTION—教案
■GOALS
TOLEARNTOGIVEADEFINITION
■PROCEDURES
STEP1:DEFININGADEFINITION
ADEFINITIONMAYBEASTATEMENTOFTHEESSENTIALPROPERTIESOFACERTAINTHING,ORASTATEMENTOFEQUIVALENCEBETWEENATERMANDTHATTERM'SMEANING.THETWOARENOTMUTUALLYEXCLUSIVE,NORARETHEYEQUIVALENT.ACONCISEEXPLANATIONOFTHEMEANINGOFAWORDORPHRASEORSYMBOL.ASTATEMENTTHATGIVESTHEMEANINGOFAWORDORSYMBOLINTERMSTHATHASBEENPREVIOUSLYDEFINEDORAREACCEPTEDASUNDEFINED
STEP2:GIVINGADEFINITION
ANEARTHQUAKEISATREMBLINGORASHAKINGMOVEMENTOFTHEEARTH'SSURFACE.EARTHQUAKESTYPICALLYRESULTFROMTHEMOVEMENTOFFAULTS,QUASI-PLANARZONESOFDEFORMATIONWITHINITSUPPERMOSTLAYERS.THEWORDEARTHQUAKEISALSOWIDELYUSEDTOINDICATETHESOURCEREGIONITSELF.THESOLIDEARTHISINSLOWBUTCONSTANTMOTION(SEEPLATETECTONICS)ANDEARTHQUAKESOCCURWHERETHERESULTINGSTRESSEXCEEDSTHECAPACITYOFEARTHMATERIALSTOSUPPORTIT....
AVOLCANOISAGEOLOGICALLANDFORM(USUALLYAMOUNTAIN)WHEREMAGMA(ROCKOFTHEEARTH'SINTERIORMADEMOLTENORLIQUIDBYHIGHPRESSUREANDTEMPERATURE)ERUPTSTHROUGHTHESURFACEOFTHEPLANET.ALTHOUGHTHEREARENUMEROUSVOLCANOES(SOMEVERYACTIVE)ONTHESOLARSYSTEM'SROCKYPLANETSANDMOONS,ONEARTHATLEAST,THISPHENOMENONTENDSTOOCCURNEARTHEBOUNDARIESOFTHECONTINENTALPLATES.HOWEVER,IMPORTANTEXCEPTIONSEXISTINHOTSPOTVOLCANOES.
ATORNADOISAVIOLENTWINDSTORMCHARACTERIZEDBYATWISTING,FUNNEL-SHAPEDCLOUD.THEWORD“TORNADO”COMESFROMTHESPANISHORPORTUGUESEVERBTORNAR,MEANING“TOTURN.”TORNADOESFORMINSTORMSALLAROUNDTHEWORLD,MOSTFAMOUSLYINABROADAREAOFTHEAMERICANMIDWESTANDSOUTHKNOWNASTORNADOALLEY.ALTHOUGHINPURENUMBEROFINCIDENCES,THEUNITEDSTATESEXPERIENCESMORETORNADOESTHANANYOTHERCOUNTRY,THEUNITEDKINGDOMISTHEMOSTPROPORTIONALLYTORNADO-PRONECOUNTRYFORITSSIZE....
AHURRICANEISASEVERETROPICALCYCLONEUSUALLYWITHHEAVYRAINSANDWINDSMOVINGA73-136KNOTS(12ONTHEBEAUFORTSCALE)