Chapter 7 Word Scramble
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Term | Definition |
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 |
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