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Science note cards

Science

TermDefinition
fossil the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
original remains the unchanged fossilized remains of animals and plants.
ice core a core removed form an ice sheet
relative age The geologic age of a fossil organism, rock, or geologic feature or event defined relative to other organisms, rocks, or features or events rather than in terms of years.
index fossil a fossil that is useful for dating and correlating the strata in which it is found.
absolute age the true age of a rock or fossil.
half-life the time taken for the radioactivity of a specified isotope to fall to half its original value.
uniformitarianism the theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes.
geological time scale a system of chronological measurement that relates stratigraphy to time,
Created by: peterp16
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