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Preston's Studyguide


Natural Selection The process by which individuals are better adpated to their environment and are more likely to survive and reproduce.
Variations Any differebce between individuals of the same species.
Half-Life The time it takes for half of the atoms in a sample to decay.
Scientific Theory A well tested concept that explains a wide range of observations.
Punctuated Equilibrium Theory The theory that species evolve quickly during short burts of time.
Fossil Record Documentation of the millions of fossils scientists have collected over time.
Radioactie Decay Unstable elements that decay or break down into different elements.
Homologous Structures Similar structures that related species have inherited from common ancestors.
Mold A hollow space left where the fossil had decayed or dissolved.
Relative Dating A process comparing the age of two fossils by their placement in the layers of the sedimentary rock layers.
Evolution Grabual changes in a species over time.
Petrified Fossils that are buied in sediments and actually changed to rock.
Adaptation A trait that helps an organism survive amd reproduce.
Gradualism Theory The theory that evolution occurs slowly but steadily.
Branching Tree A diagram that shows how scientist think different groups of organisms are related.
Radioactive Dating A process that tests the radioactive materials within a fossil to tell its actual age.
Fossils Preserved remains of an organism that lived in the past.
Extinction When no member of the species is still alive.
Cast A copy shape of the organism thats made.
Compitition This is the factor in natural selection as organisms attempt to survive using the same limited resources.
Homologous Structures Evidence tha trelated species had a common ancestor because of the way their bodies are anatomically constructed in similar ways.
Overproduction This is the factor in natural selection happens when there are more offspring that can possibly survive on the given resources.
Species A group of organisms that can mato together and produce fertile offspring
Created by: Gamexpman