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vocab 7

QuestionAnswer
uniformitarianism a principle geologic process that occured in the past can be explained
fossil trace of an organism that lived long ago
trace fossil a fossilized structure such as a footprint
climate weather over a long period of time that formed in sedimennatray rock
ice core long cylinder of ice obtained from drilling through ice caps
relative dating determining if an object is older or younger objects or events
superposition a princpiple that states that younger rocks lie above older rocks
unconformity a break in geologic record when sediment is eroded
geologic column an ordered arrangement of rock layers that is based on relative ages
absolute dating any method of measuring age of an event in years
radioactive decay radio active isotope tends to break a int stable isotope
half-life the time requireed for a half sample of life of a radioactive decay
radiometric dating a method of representing absolute age by measuring relative precentages.
Created by: Chrisman1011130
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