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1
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a unit of time that contains the Age of Dinosaurs
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2
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giant continent that exists in Earth's past
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3
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used to describe if a fossil is older or younger than another fossil
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4
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can be used to help identify the relative age of a rock layer
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5
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a geologic chart that divides Earth's history into units
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7
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all of the fossils in Earth's rock layers
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1
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occurs when many species die out at the same time
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6
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common fossil animal from the Paleozoic
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