Fossil - The preserved remains or trace of and organism that lived in the past., Mold fossil - Type of fossil that forms when sediments bury an organism and the sediments change into rock., Petrified fossil - Type of fossil that forms when minerals soak into the buried remains, replacing the remains, and changing them into rock., Trace fossil - Type of fossil that forms when the mud or sand hardens to stone where the footprint, trail, or burrow of an organism was left behind., Name the 6 types of fossils - Mold, Cast, Petrified, Preserved, Carbonized, Trace., Fossil record - Gives the important information about past life and environments on Earth., Law of superposition - Rock layers at the bottom are older than the one above them., What term do we use to compare the age of one object to the age of another object? - Relative age., What does relative age not tell? - The exact age of an object., Where are most fossils formed? - In sedimentary rocks., Sedimentary rocks pile up one atop the other. According to the Law of Superposition, younger rocks lie where? - On top of older rocks., According to the Law of Superposition, younger fossils lie where? - On top of older fossils,
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