(Print) Use this randomly generated list as your call list when playing the game. There is no need to say the BINGO column name. Place some kind of mark (like an X, a checkmark, a dot, tally mark, etc) on each cell as you announce it, to keep track. You can also cut out each item, place them in a bag and pull words from the bag.
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forms rift valleys
divergent boundaries
Causes many earthquakes
transform boundaries
Harry Hess suggested new material is being added to the ocean floor
sea-floor spreading
plates move apart
divergent boundaries
there are 12 major ones
tectonics plates
causes trenches and volcanoes
convergent boundaries
used to map bottom of ocean
sonar
gravity pulls older, denser crust beneath the trench
subduction
crust and upper mantle
lithosphere
causes crust to crumple and form mountains
two continent boundaries collide
plates side-slip past each other
transform boundaries
plates collide together
convergent boundaries
longest chain of under-water mountains
mid-ocean ridge
evidence of sea-floor spreading
molten material
magnetic poles have reversed causing a pattern on the ocean floor
magnetic stripes
