Rocks hold clues to a mystery that is slowly being unravelled. The mystery is how the Earth came to be as it is. See if you can find the words that describe many aspects of this mystery!
Playing: The Earth's Crust
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To start your game, click [New Game] below, then drag your mouse over the grid to select a word. Once found, words will remain circled. If you get really really stuck, click [Solve Game].
