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Geologic Time Scale

QuestionAnswer
How many years does the Geologic Time Scale represent since first rocks were formed? 4.6 billion years
List the divisions of time in order from largest to smallest. Eon,Era,Period, Epoch
What happened during the Precambrian Eon? The shaping of the Earth
How much fossil evidence was found in the Precambrian Eon? Little to none
What were some characteristics of the Paleozoic Era? Marine life, Few land organisms, and land plants
What did the Paleozoic Era end in and what did this cause. Mass extinction which cause 90% of all species to die
What Era was known as the Age of Reptiles? Mesozoic Era
What animal fossils were found during the Mesozoic Era? Dinosaurs, small mammals, and birds
The Age of Mammals is also referred to as the ______ ___. Cenozoic Era
How many years ago did mammals first appear? 500,000
Created by: hcps-carmonjkj
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