Fossil, Preserved remains of a living organism that lived in the past, relative age, The comparison of a fossil to find the relative age of another., Preserved fossil, Fossil that forms when an organism is prevented by decaying due to being trapped, Carbonized fossil, Fossil that forms when organisms or part of one gets pressed in layers of mud or clay, Trace fossil, Fossils that forms when a footprint is left behind in harded mud or sand, Petrified fossil, Fossil that forms when minerals soak into remains creating a rock, Fossil record, gives us important information about earths past and previous environments, Rocks, ice, tar, and amber, Things fossils/ organisms can get preserved in, Absolute dating, Radio active dating used to find the exact age of a fossil, Mold fossil, Fossil that form when sediments bury an organism than changing to rock, law of superposition, Stated that each rock layer is older than the one above it, Trilobite, Key example of index fossils

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