Shared Flashcard Set

Details

Mason Woodward
plate tectonics
20
Science
7th Grade
02/19/2014

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Cards

Term
Continental drift
Definition
continents drifted to current location (from Pangaea) was proposed by Wegener
Term
Problems with theory
Definition
No proof
Term
Problems with theory
Definition
No explanation how it happened
Term
fossil clues
Definition
similar plant and animal fossils found on both sides of the Atlantic Ocean
Term
Climate clues #1
Definition
Glacial evidence in warmer 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 the mid-Atlantic Ridge was proposed by Hess in 1960
Term
Climate clues #2
Definition
Fossils of ferns in cold climates
Term
seafloor spreading proof
Definition
newer rock near mid-Atlantic Ridge
Term
seafloor spreading proof
Definition
Magnetic clues in rocks
Term
Plate tectonic theory
Definition
crustal sections (plates) move around mantle
Term
Plate boundaries
Definition
where plates meet
Term
Continental collision
Definition
two continental (less dense) plates collide (Ex.- India & Asia)
Term
Subduction
Definition
Denser oceanic plate goes under less dense continent plate (Ex.- California coast)
Term
Convergent
Definition
plates come together
Term
Convergent formed the
Definition
Himalayas Mountains
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 (Ex.- E. African rift valley)
Term
Transform
Definition
plates slide by each other ex- San Andreas fault (California)
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