Type of fossils like footprint, eggs, ... leave marks by animal activity, trace fossil, cast fossil, mold fossil, fossil record, Type of fossils are formed when the body decomposes and leaves an empty space, trace fossil, cast fossil, mold fossil, fossil record, Type of fossils are formed when minerals enter the mold and harden., trace fossil, cast fossil, mold fossil, fossil record, the preserved part of a plant that has long since died, plant fossils, animal fossils, extinct, fossil record, the preserved part of a plant that has long since died, plant fossils, animal fossils, extinct, fossil record, the preserved part of an animal such as bones, teeth, ..., plant fossils, animal fossils, extinct, fossil record, When organism no longer lives on Earth, plant fossils, animal fossils, extinct, fossil record, information that supports an idea that something is true, paleontologist, evidence , extinct, fossil record, information that supports an idea that something is true, paleontologist, evidence , extinct, fossil record, Someone who uses fossil records to study Earth's history, paleontologist, evidence , extinct, fossil record, total number of fossils found, paleontologist, evidence , extinct, fossil record, This Era is knows as the Age of Fish and Trilobites, Paleozoic Era, Mesozoic Era, Cenozoic Era, This Era is knows as the Age of reptile , Paleozoic Era, Mesozoic Era, Cenozoic Era, This Era is knows as the Age of mammal , Paleozoic Era, Mesozoic Era, Cenozoic Era.

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