(Print) Use this randomly generated list as your call list when playing the game. 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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O-Carbon Dating
G-Mid-Ocean Ridges
I-Subduction
O-Crust
N-Hydrothermal Vent
B-Rift
G-Lithogenous Sediment
I-Density
N-They float on the upper mantle
O-Basalt
I-Gradual Continental Shelf
G-Big Bang
I-Seamount
B-One plate sinks beneath another
O-Wide Continental Shelf
I-Fault
N-4.5 Billion years ago
N-Granite
B-71%
B-Southern Hemisphere
I-Active Margins
B-Continental Shelf
O-Outer Core
G-Panthalassa
B-Shelf Break
B-Continental Drift
N-Shear Boundary
G-Magnetic anomalies, sea-floor spreading, and mid-ocean ridges