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Unit 3 Vocab

All of unit 3's vocabulary in the Florida Science Fusion book. ^-^

TermDefinition
Uniformitarianism States that geologic processes that happened in the past can be explained by current geologic processes.
Climate Describes the weather conditions in the area over a long period of time.
Fossil The trace or remains of an organism that lived long ago, most commonly preserved by sedimentary rock.
Ice Core A long cylinder of ice.
Trace Fossil A fossilized structure that formed in sedimentary rock by animal activity on or in soft sediment.
Relative Dating Determining whether an object or event is older or younger than other objects or events.
Superposition The principle that states that younger rocks lie above older rocks if the layers have not been disturbed.
Geologic Column An ordered arrangement of rock layers that is based on the relative ages of the rocks, with the oldest rocks at the bottom of the column.
Uncomformity A break in the geologic record that is made when rock layers are eroded or when sediment is not deposited for a long period of time.
Absolute Dating Determining the actual age of an event or object in years.
Radiometric Dating Finding the absolute age of a sample by determining the relative percentages of a radioactive parent isotope and a stable daughter isotope.
Radioactive Decay The breakdown of a radioactive isotope into a stable isotope of the same element or of another element.
Half-Life The time needed for half of a sample of a radioactive substance to undergo radioactive decay to form daughter isotopes.
Created by: Lizvett_M
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