Miscarea placilor tectonice Flashcards

1
Q

Exista doua miscari

A

rift si subductie

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2
Q

Rift def

A

despicatura in scoarta terestra, pe unde urca materie din interiorul Pamantului, datorita miscarii ascendente a curentilor din astenosfera
- se departeaza placile tectonice

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3
Q

Ce se intampla in timpul riftului?

A
  • cresc in suprafata bazinele oceanice
  • se formeaza dorsale oceanice, munti vulcanici, cutremure;
    ex. Doresala Medioatlantica
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4
Q

Acretia

A
  • se intampla dupa rift, cand magma iese la suprafata, se raceste, se consolideaza si se lipeste de capetele placilor 1 si 2, formand o scoarta noua
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5
Q

Subductie

A

apropierea a doua placi tectonice, in urma careia placa mai grea coboara sub cea mai usoara; placa mai usoara se cuteaza

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6
Q

Efecte subductie

A
  • munti de incretire, cutremure, vulcani;
    fose oceanice;
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7
Q

Cutremur def

A

miscari bruste ale scoartei terestre

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8
Q

Locul din int scoartei unde incepe cutremurul

A

Hipocentru

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9
Q

Locul din ext unde incepe cutremurul

A

epicentru

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