(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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longest chain of under-water mountains
mid-ocean ridge
gravity pulls older, denser crust beneath the trench
subduction
used to map bottom of ocean
sonar
Causes many earthquakes
transform boundaries
crust and upper mantle
lithosphere
causes trenches and volcanoes
convergent boundaries
magnetic poles have reversed causing a pattern on the ocean floor
magnetic stripes
plates side-slip past each other
transform boundaries
plates move apart
divergent boundaries
there are 12 major ones
tectonics plates
plates collide together
convergent boundaries
causes crust to crumple and form mountains
two continent boundaries collide
forms rift valleys
divergent boundaries
where sea-floor spreading begins
mid-ocean ridge
evidence of sea-floor spreading
molten material
Harry Hess suggested new material is being added to the ocean floor
sea-floor spreading
