Shared Flashcard Set

Details

Everette McDuffie
Plate Techtonics
20
Science
7th Grade
02/19/2014

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Cards

Term
continental drift
Definition
continents drifted to current location
(from Pangaea)
Term
who proposed continental drift
Definition
Alfred Wegener (1912)
Term
problems with theory of continental drift
Definition
1. no proof
2. no explanation of how it happened
Term
fossil clues
Definition
similar plant and animal fossils found on both sides of the Atlantic Ocean
Term
climate clues
Definition
1. glacial evidence in warmer climates
2. fossil of ferns found in cold climates
Term
rock clues
Definition
similar rock types found on both sides of the Atlantic Ocean
Term
seafloor spreading
Definition
molten rock pushed thru at mid-Atlantic Ridge
Term
proposed by Hess (1960)
Definition
seafloor spreading
Term
seafloor spreading proof
Definition
newer rocks near mid-Atlantic ridge
magnetic clues in rocks
Term
What is the Greek word for one world
Definition
Pangea
Term
plate tectonic theory
Definition
crustal sections (plates) move around on mantel
Term
plate boundaries
Definition
where plates meet
Term
convergent
Definition
plates come together
Term
congenital collision
Definition
two continental (less dense) plates collide (ex. India & Asia)
Term
subduction
Definition
denser oceanic plate goes continental plate (ex. California coast)
Term
divergent
Definition
plates spread apart
Term
transform
Definition
plates slide be each other
Term
seafloor spreading
Definition
two oceanic plates move apart
Term
what do plates move by
Definition
convectioncurrents
Term
what does conational collision form
Definition
mountains
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