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Chapter 10 Vocab

QuestionAnswer
fossils are the preserved remains or evidence of ancient living things
catastrophism is the idea that conditions and organisms on Eath change in quick violent events
uniformitarianism states that geologic processes that occur today are similar to those that have occured in the past
carbon film is the fossilied carbon outline of an organism or part of an organism
mold is the impression in a rock left by an ancient organism
cast is a fossil copy of an organism made when a mold of the organism is filled with sediment or mineral deposits
trace fossil is the preserved evidence of the activity of an organism
paleontologists scientists who study fossils
relative age is the age of rocks and geologic features compared with other rocks and features nearby
superposition is the princithat in undistured rock layers, the oldest rocks are on the bottom
inclusion a piece of an older rock that becomes part of a new rock
unconformity is a surface where rock has eroded away, producing a break, or a gap, in the rock record
correlation matching rocks and fossils from separate locations
index fossils represent species that existed on Earth for a short lenght of time, were abundant, and inhabited many locations
absolute age to mean the numerical age, in years, of a rock or object
istopes are atoms of the same element that have different numbers of neutrons
radioactive decay is the process by which an unstable element naturally changes into another element that is stable
half-life is the time required for half of the parent isotopes to decay into daughter isotoper
Created by: CKeller
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