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chapter 10 vocab

TermDefinition
Fossils Are the preserved remains or evidence of ancient living things
Catastrophism Is the 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
Carbon film Is the fossilized 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 the features nearby
Superposition Is the principle that in undisturbed 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 gap, in the rock record
correlation Matching rock and fossils from separate locations
Index fossils Represent species that existed o Earth for a short length of time, were abundant, and inhabited many locations
Absolute age To mean the numerical age, in years, of a rock or object
Isotopes Are atoms of the same element that have different number 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 isotopes
Created by: arroykev
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