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Historical Geology

plate tectonics

QuestionAnswer
What is plate tectonics? a theory that describes the formation, movements, and interactions of these plates
What is a mid ocean ridge? a long chain of volcanic mountains on the ocean floor with a deep central boundary
What are the 3 main types of plate boundaries? divergent,convergent, and transform
Divergent boundaries a boundary between two lithosphere plates that are moving apart aka spreading centers
What forms under water ridges? divergent boundaries
Mid Atlantic ridge divergent
Does divergent boundaries create new crust? yes
Convergent boundaries a boundary where two plates are moving near each other or converging
What are two broad classifications for convergent boundaries? subduction boundaries and collision boundaries
Does convergent boundaries create new crust? no it destroys crust
What does convergent boundaries form? volcanoes, deep sea trenches, fault lines, islands
What is a subduction boundary? when a oceanic plate plunges beneath another plate
True or False: subduction boundaries occur at the convergence of two oceanic plates or at the convergence of a oceanic plate and continental True
What does subduction form? deep sea trenches
What does collision boundaries for? mountain ranges
When two continent plates converge and collide what is it called? collision boundary
Transform boundary a boundary between two plates that slide past each other
Earthquakes are caused by? transform boundaries
What were the man gases of early earth? carbon dioxide,ammonia, methane ,water vapor
What was early water mainly like? hot volcanoes everywhere with no oxygen
what was the first big thing to help earth to get where it is earth cooled
Created by: zariniles
Popular Earth Science sets

 

 



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