Fossil - The preserved remains or traces of an organism that lived in the past, Environmenntal Condintions - Essential to the study of fossil formation, Mold Fossil - Type of fossil that forms when sediments bury and organism and the sediments change into rock, Petrified Fossil - Type of fossil that forms when minerals soak into the buried remains, Preserved Fossil - Type of fossil that forms when entire organisms are prevented from decaying by being trapped in rock, ice, tar, or amber, Carbonized Fossil - Type of fossil that forms when organisms are pressed between layers of soft mud or clay that hardens, Trace Fossil - Type of fossil that forms when mud or sand hardens to stone, Fossil Record - Gives important information about past life and environments on Earth, Relative Age - What we use to compare the age of one object to the age of another object, Law of Superpostition - The law that states each rock layer is older than the one above it, Sedimentary Rocks - Where most fossils are formed, Youngest Fossil - The top of rock layers, Oldest Fossil - The bottom of rock layers, Trilobite - Example of an index fossil,

Fossil 8th Grade Science

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