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achoo

geologic time scale

QuestionAnswer
How many geologic eras are there? 4
What are the names of the eras from oldest to youngest? precambrian,paleozoic,mesozoic,cenozoic
How many types of rocks are there? 3
What type of rock forms by erosion? sedimentary rock
What type of rock forms by heat and pressure? metamorphic rock
What type of rock is formed by lava when it cools down? igneous rock
What era are we in right now? cenozoic era
Created by: beak127
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