Fossil Facts
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| Fossils | remains,imprints,or traces of phestoric orginsms that can tell when and where orginsms once lived and how they die.
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| Permineralized Remains | Fossils in which the spaces inside are filled with minerals from groundwater.
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| Carbon Film | thin film of carbon residue preserved as a fossil.
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| Mold | a type of body fossilthat forms in rock when an orginism with hard parts is buried, decays or disolvesand leaves a cavity in the rock.
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| Cast | a type of body fossil that forms when crystals fill a mold or sedimentgs wash into mold and harden into rock
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| Indext Fossil | remains of species that existed on earth for a relatively short period of time, were abudent and wide spreadgeographically,and can be used by geoligest the ages of rock layers.
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| Principle Of Superposition | state that is undisturbed rock layers , the oldest rock are on younger towared the top.
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| Relative Age | the age of something compared with outher things.
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| Unconformity | gap in the rock layer that is due to erosion or period without any deposition.
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| Absolute Age | age, in years of rock or other object can be determined by using propoerties by using properties of the atoms that make up materials.
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| Radioactive Decay | processing which some isotopes break down into other isotopes and perticles.
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| Half-life | time it takes for half of the atoms of an isotope to decay.
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| Raidometric Dating | Process used to calculate absolute age of rock by measuring the raito of parent isotope to daughter product in a minnerial and Knowing the half life
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Created by:
cavbriana&carolyn
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