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Science Chapter 10

vocab.

QuestionAnswer
What is a fossil? Preserved remains or evidence of ancient living things.
What is catastrophism? The idea that conditions and organisms on Earth change in quick, violent events.
What is uniformitarianism? A principle that states that geologic processes that occur today are similar to those to those that have occurred in the past.
What is carbon film? The fossilized carbon outline of an organism or part of an organism.
What is a mold? The impression in a rock left by an ancient organism.
What is a trace fossil? The preserved evidence of the activity of an organism.
What is a paleontologist? Scientists who study fossils.
What is relative age? The age of rocks and geologic features compared with other rocks and features nearby.
What is superpostion? The principle that in undisturbed rock layers, the oldeest rocks are on the bottom.
What is inclusion? A piece of an older rock that becomes part of a new rock.
What is unconformity? A surface where rock has eroded away, producing a break in the rock record.
What is correlation? Matching rocks and fossils from separate locations.
What is index fossils? Represents species that existed on Earth for a short length of time.
What is absolute age? Mean the numericsl age, in years, of a rock or object.
What is isotopes? Atoms of the same elemnt that have different numbers of neutrons.
What is radioactive decay? The process by which an unstavle element naturally changes into another element that is stable.
What is a half-life? The time required for half of the parent isotopes to decay into daughter isotopes.
Created by: Kendlle97
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