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Plate Tectonics

Plate Tectonics 7th grade

QuestionAnswer
Plates slide past each other. Transform Boundary
Plates spread apart. Divergent Boundary
Plates collide. Convergent Boundary
One plate going under another is called... Subduction Zone
Volcanoes occur at or near these boundaries. Divergent and Convergent (only if subduction zone)
Mountains form at or near these boundaries. Convergent (or if volcanoes get tall enough, then divergent)
When continental crust and continental crust collide, these changes happen to the land. Mountains and earthquakes
When oceanic crust collides with either oceanic or continental crust, these changes happen to the land. Subduction zone that makes volcanoes (which can be mountains if tall enough)and earthquakes
What changes to land happen at a transform boundary? Earthquakes (and can change directions of rivers)
This type of boundary can form a new sea/ocean. Divergent
Evidence of a divergent boundary in the Atlantic Ocean. Earthquakes and volcanoes under water, Iceland getting wider (and having volcanoes), and the Atlantic Ocean getting wider (satellite evidence of this)
Evidence of Indian plate colliding with the Eurasian Plate The Himalayas are there and getting taller. The southern tip of India is moving northeast.
Many scientists think that this is happening in the mantle to move the plates. Convection Currents in the Mantle.
The cause of mantle convection. Magma near the core is hotter, so it is less dense and rises. Near the lithosphere, it is cooler and more dense, so it sinks like a brick.
Created by: TBraunsdorf
 

 



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