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Chapter 7

geologic time

TermDefinition
eon longest units of geological time
era eons are subdivided into smaller units of time into these
period eras are subdivided into these
epoch periods are subdivided into these
mass extinction extinction of many species on Earth within a short period of timw
land bridge connects two continents at were previously separated
geographic isolation separation of a population of organisms from the rest of its species due to some physical barrier, such as a mountain range or an ocean
Paleozoic era the oldest era of the phanerzoic eon
Mesozoic era middle era of the phanerzoic eon
Cenozoic era youngest era of the phanerzoic era
inland sea body of water formed when ocean water floods continents
coal swamp oxygen-poor environment, where over time, plant material changes into coal
supercontinent ancient landmass which separated into present-day continents
Created by: booecam3836
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