This bingo card has 16 words: calcium - 40, 10g, widespread/short period of time, 4.5 x 10, precambrian, mass extinction, volcanic ash/ meteorite debris, shelly body parts, contact metamor-phism, free space, uncon-formity, C-14, Pb-206, 4,600 million years, igneous and meta-morphic.
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With players vying for a you'll have to call about __ items before someone wins. There's a __% chance that a lucky player would win after calling __ items.
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