Download Evolution vocabulary

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Evolution vocabulary
adaption a trait that helps an organism survive in its
Evolution the process by which a species gradually
changes over time
fossil the remains of an organism that lived a long
time ago
Gene pool
gene pool all the genes in a population
Genetic drift
genetic drift a random change in a gene pool caused by
chance events
Geologic time scale
geologic time scale the record of Earth's history based on the types
of organisms that lived at different times
Natural Selection
natural selectionthe survival of offspring that have favorable
Radioactive dating
Radioactive dating a way to determine the age of a fossil by
measuring the amount of radioactive elements
in it
Relative dating
relative dating a way to estimate the age of a fossil by
comparing its position in a rock layer
older fossils = deeper in rock
younger fossils = more towards surface
variation a difference in a trait among individuals in a