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Portage 8 Plate Tect

Portage 8 Plate Tectonics

QuestionAnswer
Alfred Wegener scientist who came up with idea of continental drift
continental drift idea that continents move around slowly
asthenosphere bottom part of mantle that flows
convection current heat transfer by hotter less dense material rising, and cooler more dense material sinking; goes on in mantle; moves plates;
convergent boundary area where two plates move toward each other
crust outer layer of earth; thinnest and least dense layer
divergent boundary area where two plates are spreading apart; forms mid
hot spot heated rock rises from mantle in thin column; can cause volcanoes as plate moves over it
inner core very center layer of earth; hottest and densest; made of solid metal
outer core layer of earth under mantle and above inner core; made of liquid metal
lithosphere solid crust + rigid top part of mantle
magnetic reversal sea
mantle thickest layer of earth; located under crust and above outer core
mid ocean ridge
Pangaea supercontinent of long ago when all continents were joined together; before started drifting apart
plate tectonics theory that earth's lithosphere is divided up into large pieces that move due to convection currents in the mantle
rift valley area formed by diverging plates; between mid
subduction a denser plate goes underneath a less dense plate; at ocean
tectonic plate a large chunk of earth's crust + upper mantle that moves around slowly
theory an explanation that is supported by much scientific evidence
trench a deep canyon formed on ocean floor as one plate sinks under another; where subduction happens at convergent boundaries
transform boundary area where two plates slide side
mountains form where crust is folded when two continental plates collide with each other; examples are the Alps and the Himalayas
Created by: karpeleniajenny
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