英语ⅲ外研版module3 theviolenceofnature-function教案1

  • 格式:doc
  • 大小:17.00 KB
  • 文档页数:1

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)