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NICK LIZANA
plate tectonics
20
Science
7th Grade
02/19/2014

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Cards

Term
continental drift
Definition
continents drifted to current location
Term
The continental drift was purposed by...
Definition
Wegner in 1912
Term
The problems with the theory are....
Definition
lack of proof and no explanation of how it happened
Term
Fossil clues are...
Definition
similar plant and animal fossils found on both sides of the Atlantic Ocean
Term
Climate clues are...
Definition
Glacial evidence in warmer climates and Fossils of ferns in cold climates
Term
Rock clues are...
Definition
similar rock types found on both sides of the Atlantic ocean
Term
Seafloor spreading is...
Definition
molten rock pushed through at mid Atlantic Ridge
Term
this theory was proposed by....
Definition
Hess in 1960
Term
Proof is
Definition
newer rocks near the mid Atlantic ridge and magnetic clues in rocks
Term
Plate tectonic theory
Definition
crustal sections (plates move around on mantel
Term
Plates move by....
Definition
Convectional currents
Term
How many currents are there?
Definition
13-14
Term
Plate boundaries..
Definition
where plates meett
Term
Convergent..
Definition
where plates come together
Term
Continental Collision...
Definition
two continental (less dense) plates collide (ex.- India and Asia)form mountains
Term
Subduction...
Definition
denser oceanic plate goes under less dense continental plate (ex.-California Coast)
Term
Divergent...
Definition
plates spread apart
Term
Seafloor spreading...
Definition
two oceanic plates move apart (ex.-mid Atlantic ridge)
Term
Rift Valley...
Definition
two continental plates move apart 9ex.- E African Rift Valleys)
Term
Transform...
Definition
plates slide by each other
-ex. - San Andres fault (Carolina)
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