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plate tectonics

Across
Vertical circulation pattern in a gas or liquid
particles deposited by water flow
magma creates new crust and widen seafloor
single giant continent
used to determine age of rocks
flattest feature
pressure and heat change the rock chemically
north america and europe together
movement destroys crust
a submarine mountain
Down
continents were one single land mass
depression in sea floor
deep valleys running through mod ocean ridge
area where magma exits the earth
magma cools and hardens
south america and africa
underwater mountain range
single large ocean
small melting area within mantle
a seamount with a flat top