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Definition
| preserved remains or evidence of an anciet organism |
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Term
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Definition
| estimate a fossil's age based on the radioactive isolopes it contains |
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Term
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Definition
| the length of time that required 1/2 radioactive atoms in a sample to decay |
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Term
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Definition
| estimate a fossil's age by comparing it to other fossil using the layers of rocks as a guide |
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Term
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Definition
| allows scientist to determine the age of rock layer |
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Term
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Definition
| the organism is burried by layers of sediment over many centuries, the remains absorb the minerals of sediment and turn into rock |
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