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13 Cards in this Set

  • Front
  • Back

converging plate boundary (Subduction zone) moves in what direction- describe

pushing together. Lithosphere goes under other lithosphere (ontop, rigid mountains)


Athemosphere below

Draw a converging plate boundary (collision zone_

pushing together. Lithosphere goes slightly under other lithospgere (rigid mountains in center) athemosphere below)

Draw a diverging plate boundary

Moving away from each other

Draw a transform fault boundary

Moving In different directions (rubbing against each other

first evidencesthat suggest pangaea (4)

continents fit together like a jigsaw (South America/Africa




Similar plant/animal fossils on both contenets




Similarly aged/structure mountains




Ice sheets covered warm locations suggest continents were closer to south pole once

when did pangea drift apart

200 million ya

what is plate tectonics

first theory that supported pangaea. core causes convection currents, shifting 2- plates that make up shell




Unequal distribution of heat in core causes convection currents

why did scientists disagree with wegeners theory

no explanation for how they moved

how many plates is earths outer shell made up

20 of oceanic/continental crust. float on mantle.

why are plate boundaries prone to collision

convection currents moves plats.

how are ridges formed

convection current move plates apart, spreading apart sea floor. magma rises and forms ridge

how are trenches formed

colliding plates cause plates to subduct forming trench creating volcanoes.



how do earthquakes happen

snap of moving plates