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Chapter 5 Test: Earth's Layers: Uddo Earth Science
Terms in this set (44)
What type of rock is oceanic crust composed of?
What type of rock is continental crust composed of?
What is the density of oceanic crust?
What is the density of continental crust?
What is the thickness of oceanic crust?
What is the thickness of continental crust?
intrusive igneous, white/pink, coarse
extrusive igneous, grey, fine
What minerals make up the crust?
basalt and granite
What minerals make up the core?
iron and nickel
Layers of the Mantle
rigid upper, asthenosphere, and stiffer mantle
Where does convection happen in the mantle?
the gradual separation of Pangea
a supercontinent, the theory that all the continents were once stuck together
any trace of an ancient organism that is preserved in rock
breaks in the Earth's crust where rocks have slipped past each other, form along these boundaries
a section of the lithosphere that slowly moves over the asthenosphere carrying pieces of continental and oceanic crust
two plates that slowly move away from each other
Mid Ocean Ridge
an undersea mountain chain where new ocean floor is being produced, created at divergent boundaries
steep sided valley
Sea Floor Spreading
the process by which molten material adds new oceanic crust to the ocean floor
a boundary where two plates collide or come together
the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent boundary
Deep Ocean Trench
a deep valley along the ocean floor where crust sinks into the mantle
magnetic minerals inside the rock line up in the direction of Earth's pull
a pocket of magma a volcano forms above it when lava erupts through the crust
Ring of Fire
a belt of volcanoes that circle the Pacific Ocean
Who developed the Theory of Continental Drift?
types of divergent boundaries
Mid Ocean Ridge and Rift Valley
Mid Ocean Ridge
underwater plate boundary and it creates new ocean floor
on land plate boundary and it creates a wider valley
types of convergent boundaries
oceanic-oceanic, oceanic-continental, and continental-continental
underwater plate boundary and it creates island arcs/volcanoes
where the ocean meets land and it creates volcanic mountain ranges
land meets land and it creates mountains
What makes plates move?
What type of plate boundary does subduction occur at?
What plate boundaries do deep ocean trenches occur at?