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Plate Tectonics
Lou Baker
21
Science
7th Grade
02/19/2014

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Cards

Term
Continental drift
Definition
Continents drifted to their current location from Pangaea
Term
Who was continental drift proposed by
Definition
Alfred Wegener
Term
Problems with continental drift theory
Definition
No proof, no explanation of how it happened
Term
Pocd- fossil clues
Definition
Similar plant and animal fossils found on both sides of Atlantic Ocean
Term
Pocd- Climate clues
Definition
Glacial evidence in warmer climates
Fossils of ferns in cold climates
Term
Pocd- rock clues
Definition
Similar rock types found on both sides of Atlantic Ocean
Term
Sea floor spreading
Definition
Molten rock pushed through at mid-Atlantic Ridge
Term
Who was sea floor spreading proposed by
Definition
Henry hess
Term
Proof of sea floor spreading
Definition
Newer rocks near mid-Atlantic Ridge
Magnetic clues in rocks
Term
plate tectonic theory
Definition
crustal plates move around on mantle
Term
how do plates move
Definition
convection currents
Term
how many major plates are there
Definition
13-14
Term
plate boundaries
Definition
where plates meet
Term
types of boundaries
Definition
convergent, divergent, transform
Term
convergent boundaries
Definition
plates come together
Term
continental collision
Definition
two continental plates collide (India and Asia) -form mountains
Term
Subduction
Definition
denser organic plate goes under less dense plate
Term
divergent
Definition
plates spread apart
Term
seafloor spreading
Definition
two oceanic plates move apart
Term
rift valley
Definition
two continental plates move apart
Term
transform
Definition
plates slide by each other
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