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Sec. 14-1 Vocab.

Geologic Time Scale The division of Earth's history based on the appearance or disappearance of organisms.
Eons Longest subdivisions of time.
Eras Long time divisions marked by major, striking, and worldwide changes in the types of fossils present.
Periods Units of geologic time characterized by types of life existing worldwide at the time.
Epochs Shortest units of time for Earth's geologic history.
Mesozoic Era Age of the dinosaurs.
Precambrian Time Name of the longest time period in the geologic time scale
Paleozoic Era Reptiles, amphibians, and fish appear during this time period.
Cenozoic Era Time period when mammals and humans appear in the geologic time scale.
Organic Evolution Change in species which allows their survival over time.
Species A group of organisms that normally reproduces only with other members of their group.
Natural Selection Process by which organisms with characteristics that are suited to environment have a better chance of survival and ability to reproduce than those without those traits.
Charles Darwin Father of the Theory of Evolution
Artificial Selection Humans look for the desired characteristics and breed the two individuals in order to enhance that desired trait.
Fittest Organisms best suited for the environment at the time will survive and those not suited for the environment will die off. This is known a Survival of the ______________.
Trilobites These index fossils underwent many changes over time. This included eyes, body shape, and size.
Pangaea Name of the supercontinent which broke apart during the Mesozoic Era.
Created by: lmcclapper
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