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Science

Chapter 13+14 vocab cards

TermDefinition
Absolute Age The age of a rock or other object in years
Carbon Film A thin film of carbon residue is left forming a silhouette of the original organism
Cast Mineral rich water or other sediment may enter the cavity in the rock forming a copy or ____
Fossil The remains/imprints or traces of prehistoric organisms
Half-Life Time that it takes for half of an isotope to decay
Index Fossil Remains of species of animals that existed on earth for a short period of time
Mold A type of body fossils that forms in rock when an organism with hard parts is buried and leaves a cavity
Permineralized Remains Fossils of which the spaces inside one filled with minerals from groundwater
Principle of Superposteration States that in undisturbed rock layers older rocks are on the bottom and newer are on the top.
Radioactive Decay Process in which some isotopes break down into other isotopes and particles
Radioactive Dating Process of calculating the absolute age by measuring the ratio of parent isotope to daughter product in a mineral and knowing the half life of of the parent
Relative Age The age of something compared to other things
Unconformity A gap in the rock layer
Uniformatitorism Principle stating processes of earth today are similar to those today
Cenozoic Era A recent era of life beginning approximately 66 MYA
Cynobacteria Chlorophyll-containing photosynthetic bacteria thought to be one of the earliest organisms on earth.
Eon Longest subdivision of time on the geologic time scale, based on life
Epoch Next smallest subdivision after a period
Mold A type of body fossil that forms in rock when an organism with hard parts is buried and leaves a cavity
Permineralized remains Forssils of which the spaces inside one filled with minerals from groundwater
Principle of superpostirisation States that in undisturbed rock layers older rocks are on the bottom of the layers
Radioactive dating Process of calculating the absolute age by measuring
Relative age the age of something compared to another thing
Trilobite Organism with a three lobed exoskeleton
Created by: Merzluck
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