tema 2. o relevo
TRANSCRIPT
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U.D. 2:O relevo da Terra
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CAPAS EXTERIORES DA TERRA
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CAPAS EXTERIORES DA TERRA
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Litosfera. Corteza terrestre
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Formación do relevo: Eras xeolóxicas
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http://recursos.cnice.mec.es/biosfera/alumno/1ESO/corteza/contenidos3.htm
Amplia información sobre xeoloxía terrestre
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Litosfera. Continentes e océanos
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Capas externas e internas da Terra
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A PANXEA
http://almez.pntic.mec.es/~jrem0000/dpbg/2bch-ctma/tema7/moviePangaea.swf
http://www.deciencias.net/proyectos/4particulares/tectonica.htm
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PLACAS TECTÓNICAS
Movemento dos continentes
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ZONAS DE SUBDUCIÓN DAS PLACAS
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PREGAMENTO: materias brandos
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PARTES DUN PREGAMENTO
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FALLAS: materias duros
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https://www.youtube.com/watch?v=3wzvy5LgkRA
Discovery channel- Fallas
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FALLAS XEOLÓXICAS
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RIFT VALLEY
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FALLA. CATARATA DE IGUAZÚ
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FALLA. CATARATA DE IGUAZÚEntre o río Iguazú e o Paraná
Entre Arxentina e Brasil
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CATARATAS DO NIÁGARAEntre EE.UU. E Canadá (Río Niagara e o lago Ontario)
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CATARATAS VICTORIANo río Zambeze. En Zimbawe
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Volcáns: axentes internos modificadores do relevo
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Partes dun volcán
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Tipos de volcáns según a súa erupción
Lava fluída e moitos gases e non se forman cinzas. A lava cae polo cono
Lava moi fluída e non expulsa gases e deslízase polo cono
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Tipos de volcáns según a súa erupción
VULCANIANOMagma pouco fluída e moitos gases. Explosións moi fortes e formación de cinzas. O magma solidifícase rápidamente
VESUBIANOMoita presión nos gases polo que as explosións son moi violentas. Forma nubes ardentes que cando se enfrían, hai precipitacións de cinzashttps://www.youtube.com/watch?v=GStPBfSH05k
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O vesubio
VESUBIO: Situado cerca da cidade de Nápoles, en Italia. Mide 1132 m de altura. No ano 79, a súa erupción sepultou as cidades de Pompeya, Herculano e Stabila. A súa última erupción importante tivo lugar no ano1944.
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Volcán KRAKATOA
KRAKATOA: Esta illa atópase en Indonesia. En 1883 a explosión violenta deste volcán, equivalente a 600 bombas H, afundiu a illa máis de tres metros e maou a máis de 35.000 persoas.
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Volcán MAUNA LOA
MAUNA LOA: Principal volcán de Hawai; A SÚA base está a 5.000 m de profundidade e a cima a 4.205 m. Está en actividade.
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ETNA: Atópase na illa de Sicilia (Italia). Ten una altura de 3269 m e o perímetro da súa base alcanza os 150 Km. Atópase en actividade.
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FUJI YAMA: Volcán extinto de Japón. É considerado unha montaña sagrada
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MONTE PELÉ (Martinica). No 1902 destruíu a cidade de Saint Pierre
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CHICHÓN (México). No 1982 causou 2.000 mortos e mandou á atmósfera gran cantidade de gases. Volcán Vanuatuhttps://www.youtube.com/watch?v=VuQrUwFn6bU (
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TERREMOTOS: Axente interno modificador do relevo
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PROCESO DUN TSUNAMI
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UN TSUNAMI CHEGANDO Á COSTA
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A ALTURA DUN TSUNAMI
https://www.youtube.com/watch?v=Mz5NxzfvInI
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Axentes externos modificadores do relevoA AUGA
Partes do curso dun río
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Erosión dos ríos
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Erosión por auga. Cañóns
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Praia das Catedrais
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Glaciares
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Axente externo: O xeo
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Axente externo: O vento
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Modificación do relevo polo ser humano
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Axentes externos e internos
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Formas do relevo terrestre
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Formas do relevo terrestre
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Formas do relevo terrestre
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Formas do relevo terrestre
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Proyecto Biosfera - Tiching
Repaso Erosión
Libros vivos
Volcáns
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http://www.educa.jcyl.es/educacyl/cm/gallery/Recursos%20Infinity/aplicaciones/web_conocimiento/volcanes/aprende.htm