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| Michigan's Mesozoic bedrock is missing due to _____ erosion. |
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| An assumption based upon observation is called an ______. |
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| So far, the remains of _____ dinosaurs have been discovered in Michigan. |
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Definition
| The _____ Era begins at the Cambrian Explosion of life. |
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Term
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Definition
| The time it takes for half of a mass of a _______ element to decay is called it's half-life. |
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Definition
| _____ fossils are only found in the Quaternary Period. |
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Definition
| ______ aging compares the age of one fossil with another. |
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