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8th ScienceHARDY
8th Geologic Histoy LESSON 1 VOCABULARY
Question | Answer |
---|---|
EON | longest unit of geologic time |
EPOCH | subdivision of a period |
ERA | subdivision of an eon |
EXTINCT | separation of a population of organisms from the rest of its species due to a physical barrier. |
GEOLOGICAL ISOLATION | separation of a population of organisms from the rest of its species due to a physical barrier |
LAND BRIDGE | stretch of land that connects two continents that were previously separated by water |
MASS EXTINCTION | dying out of many species on earth within a short period of time |
PERIOD | subdivision of an era |
SCALE | series of marks or points at known intervals |