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Energii neimblanzite
1. Cutremurele2. Vulcanii
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Cutremurele• Def.-zguduituri puternice ale scoartei terestre.• Cauze-deplasarea si ciocnirea placilor tectonice• -vulcanismul• - inchiderea periodica a vulcanilor in magma solidificata• Elementele unui cutremur:• A) hipocentru (focar) –locul de formare a cutremului.• B) epicentru -corespondentul la suprafata al hipocentreului.• Efecte – pagube materiale• - obiective industriale• - pierderi de vieti umane si animale• -tzunami
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Cutremurele
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Urmarile cutremurelor
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Vulcanii• Def. 1-vulcanism-totalitatea fenomenelor legate de eruptiile vulcanilor.• 2-magmatism-totalitatea fenomenelor legate de migrarea si consolidarea
magmei in interiorul scoartei.• Fenomene vulcanice:• 1 – fenomenele intrusive – au loc in interiorul scoartei• 2 – fenomenele extrusive – cele care au loc la suprafata scoartei• Produsele vulcanice – vapori de apa• - ape termale• - coloane tasnitoare de apa • - cenusa vulcanica• - fragmente de roca vulcanica• - lava dupa dioxid de siliciu- bazice• - acide
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• Elementele vulcanilor: cos, con, basin magmatic, crater, lava• 1- Relieful volcanic de explozie: cratere- simple • - caldeire- cratere largite prin eroziune si prabusiri • -maare- explozii de gaze si vapori de apa• 2- Relieful vulcanic de acumulare:• - con - platouri• 3- Relieful vulcanic de eroziune:• - in crater - retea hidrografica radiar convergenta• - pe con – retea hidrografica radiar divergenta• - la baza conului- retea hidrografica inelara
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Explozii vulcanice
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Urmarile vulcanilor