This bingo card has 20 words: ecosystem, river, food chain, drought, level, competition, nature, negative, positive, resources, behavior, supply, increases, decreases, amount, balance, control, interact, react and scarce.
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Learn how to conduct a bingo game.
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.
Tip: If you want your game to last longer (on average), add more unique words/images to it.
