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Lesson 1+2 vocab

Lesson 1 vocab

QuestionAnswer
Eons the longest units of geologic time
Eras eons are subdivided into smaller units of time
Periods what eras are divided into
Epochs what periods are divided into
Mass extincition the extinction of many species on Earth within a short period of time
Land bridge connects two continents that were previously separated
Geographic isolation the separation of a population of organisms from the rest of its species due to some physical barrier, such a as a mountain range or an ocean
Paleozoic era oldest era of Phanerozoic eon
Mesozoic era the middle era of Phanerozoic eon
Cenozoic era the youngest era of the Phanerozoic
Inland sea a body of water formed when ocean water floods continents
Coal swamp an oxygen-poor environment where, over time, plant materials changes into coal
Supercontinent an ancient landmass which separated into present-day continents
Created by: swearzac4021
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