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Ch 4 Plate Tectonics

QuestionAnswer
__ is the theory that describes how pieces of the lithosphere move on top of the asthenosphere. Plate Tectonics
__ is the theory that continents can drift apart from one another and have done so in the past. Continental Drift
_ is the process by which new oceanic lithosphere is created as older materials are pulled apart. Sea-floor Spreading
__ are underwater mountain chains that run through the Earth’s oceans. Mid-Ocean Ridges
__ is the process where hot material rises and cooler material sinks. Convection
The lithosphere is divided into pieces called __. Tectonic Plates
Sea-floor spreading occurs at which type of plate boundary? Diveregent Boundary
Mid-ocean ridges occur at which boundary? Diveregent Boundary
The type of tectonic plate boundary involving a collision between two tectonic plates is ___. Convergent Boundary
When two tectonic plates slide past each other horizontally, the boundary between them is called a ___. Transform Boundary
The part of the Earth on which the tectonic plates are able to move is the__. Asthenosphere
When two tectonic plates move away from one another, the boundary between them is called a __. Divergent Boundary
Name two plate boundaries where subduction occurs. Oceanic/Oceanic and Oceanic/Continental
When continental and oceanic crusts collide ___ Oceanic is subducted and volcanoes form
When oceanic and oceanic crusts collide ___ One oceanic is subducted and volcanoes form.
When continental and continental crusts collide ___ They buckle and form mountains.
Proof that continental drift occurred ___ 1. puzzle like fit of continents 2. fossils on both sides of ocean 3. similar rocks and climate conditions 4. glacier grooves line up
Proof that Sea-floor spreading occurred ___ 1. new crust at center of boundaries, older as it moves away. 2. magnetic reversals are set in the hardened magma.
Created by: jen71
 

 



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