trace - fossils that show evidence of organism activity, preserve - to maintain something in its original or existing state, decay - the process or result of being slowly destroyed by natural processes , amber - hardened tree resin, yellow to brown in color, often a source of insect fossils, extinct - no longer in existence , sediment - deposited rock particles and other materials that settle in a liquid, remains - the parts left over after other parts have been removed, used, or destroyed, organism - an individual animal or plant that is living or was once living, fossilization - the process of creating fossils in sediments such as ash, mud, sand, or amber , fossil - any evidence of the preserved remains, or traces of remains, of ancient organisms , index fossil - fossils that only appear for a short time in earth's history. They are used to help scientists date rock layers.,

Fossils & Natural Resources

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