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10 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Fossil |
The preserved remains or traces of an organism that lived in the past |
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Mold fossil |
When sediments bury an organism and the sediments change into rock |
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Cast fossil |
When a cast is filled with sand or mud that hardens into the shape of the organism |
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Petrified/permineralized fossil |
When minerals soak into the buried remains, replacing the remains turning them into rock |
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Preserved fossil |
When entire organism or parts of organisms are prevented from decaying from: Rock, ice, tar, and amber |
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Carbonized fossil |
When organisms or parts are pressed between layers of soft mud or clay that hardens all the decaying of an organism away leaving the carbon imprint in the rock |
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Trace fossil |
When the mud or sand hardens to a stone where a footprint, trail, or burrow of an organisms is left behind |
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Law of superposition |
The relative age of rocks and fossils |
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Relative age |
Relative age is the appropriate age , does not tell the exact age of an object |
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Absolute age |
absolute age is the exact age (by chemically dating) |
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