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Changing Earth

TermDefinition
Mold A fossil formed when an animal,plant,or other organism dies and is covered by sediment it flesh decays and bones deteriorate due to chemical reactions, and a cavity remains below the ground surface.
Cast A fossil formed when an animal, plant, or other organism dies, its flesh decays and bones deteriorate due to chemical reactions; minerals gradually enter into the cavity, resulting in a cast, which is in the general form of the original organism.
Carbon Film Carbon films are thin film coatings which consist predominantly of the chemical element carbon. They include plasma polymer films, amorphous carbon films(diamond-like carbon, DLC), CVD diamond films as well as graphite films.
Trace Fossil a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.
Preserved Remains The definition of a fossil is the preserved remains of a prehistoric organism or is slang for someone or something that is old and outdated. An example of a fossil is the preserved remains from a prehistoric organism that have been preserved inside rock.
Catastrophism idea that conditions and organisms on Earth change in quick,violent events.
Uniformitarianism states that geologic processes that occur today are similar to those that have occurred in the past
Stratigraphy the branch of geology that studies the order and relative age of rock/soil layers on Earth
Law of Superposition states that the youngest layer of Earth are located on the surface and as you go deeper into the earth,the layers get older
Relative age is a way of describing how old something is not by using numbers but by using a comparison
index fossil fossil of an organism that was alive for only a short period of time, were abundant and widespread geographically; scientists can use these to assign dates to rock layers
absolute age the numerical age in years of an object
radiometric dating process to determine absolute age of an object isotopes break down into other isotopes and particles
halflife time it takes for half the atoms of an isotope to decay
Created by: jovii.16
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