Term
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Definition
| fossils are the preserved evidence of ancient living things |
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Term
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Definition
| when and animal dies it gets buried under sediments, eventually they harden and turn to rock |
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Term
| how is petrified rock/wood formed |
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Definition
| sometimes after an organism is buried, water rich in minerals disolves the original organic matter. when this original matter is preserved, the plant or animal tuns to stone |
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Term
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Definition
| amber is formed when tree sap covers an animal and hardens |
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Term
| how do scientits determine the age of rocks |
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Definition
| radiometric dating, relative dating, index fossils |
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Term
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Definition
| when an organism is buried and squeezed between layers of sediments, the fluids are removed from the organism...a thin film of carbon remains and an imprint remains |
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Term
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Definition
| an empty space where an organism used to lay |
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Term
| how is a fossilized mold formed |
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Definition
| if buried organic material dissolves to leave an empty space that is the shape of the origanal organism or its parts |
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Term
| how are radiometric dating and relative dating different? |
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Definition
relative dating-if a a pile of rocks is undisturbed then the youngest rocks are on top and the oldest rocks are on the bottem radiometric dating-the older the fossil is the less carbon-14 it has |
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Term
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Definition
| cenozoic, mesozoic, paleozoic, precambrian |
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