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11 Cards in this Set

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arangement of rock layers based upon the ages of the rocks
geologic column
largest unit of gologic time
era
subdivision of a geologic era
period
subdivision of a geologic period
epoch
earliest and longest geologic era lasting from 4.6 billion to 570 million years ago
precambrian time
geologic era that followed precambrian time lasting from 570 million to 245 million years ago
paleozoic era
geologic era that lasted from 245 million to 60 million years ago, the age of the reptiles
mesozoic era
the most recent geologic era, begining 65 million years ago,the age of the mammals
cenozoic era
theory that organisms change over time and that new organisms are derived from ancestral types
theory of evolution
animals without backbones
invertebrates
animal with a backbone
vertebrates