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earth's layers

science

QuestionAnswer
what is the oceanic crust made of? silicon oxygen iron magnesium
what is the lithosphere broken into? plate called tectonic plates
explain sea floor spreading sea floor spreading is when magma rises from the mid ocean ridge and then the magma hardens and forms oceanic crust
explain subduction when the magma comes up the mid ocean ridge the ocean floor spreads apart and the old ocean floor is pushed into deep trenches and gets recycled
what does the old ocean floor go> to the mantle
what are two other ways plates move? slab pull and ridge push
with the slab pull what pulls and cools dense plates? gravity
what is an example of ridge push? an avalanch in slow motion
what is eurasian? europe and asia
what is the largest major plate? pacific
how much of earth does it over? 1/5
how much do the plates move a year? 1-10 cm
what do divergent boundaries do? move apart
what do convergent boundaries do? collide
what is more dense-oceanic or continental? oceanic
what happens when oceanic vs. oceanic collide? the older oceanic plate is subducted under the newer oceanic plate
where does the oceanic plate get pushed? into the asthenosphere
what islands are an example of oceanic vs oceanic? japan and indonesia
what is eurasian? europe and asia
what are hot spots? molten rock that continually erupts
does sydney look like a mushroom? yes
Created by: heck yeah
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