1) Cenozoic Era a) Age of mammals b) Ocean life dominant c) No evidence of living things 2) Paleozoic Era a) Age of mammals b) Ocean life dominant c) Age of reptiles 3) Mesozoic Era a) Age of reptiles b) Age of mammals c) No evidence of life 4) PreCambrian Era a) No evidence of life b) Age of reptiles c) Age of mammals 5) Order of geologic time from smallest to largest a) epoch, period, era, eon b) period, eon, epoch, era c) era, eon, period, epoch 6) The longest era of time a) Cenozoic b) Paleozoic c) PreCambrian

Geologic Timeline

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