Mold fossil - When sediments bury an organism and the sediments change into rock, Preserved fossil - Type of fossil that is prevented from decaying by being trapped in tar, amber, ice or rock, Trace fossil - When mud/sand hardens to stone where a footprint, burrow, or trail was left behind, 6 types of fossils - mold, cast, trace, preserved, carbonized, petrified, The fossil record - What gives important information about past life and environments on Earth?, The fossil record tells us the particular time an organism became extinct - What does the fossil record tell us about extinct organisms?, The exact age of an organism - What does relative age not tell?, Relative age - Term that we use to compare the age of one object to the age of another object?, Near the top - Youngest fossil lies where?, Near the bottom - Oldest fossil lies where?, Law of superposition - Oldest rock layers are found at the bottom, youngest rock layers are found at the top, The rock layers have been preserved in their original sequence - Relative dating can be used only when what?,

Fossils 8th grade science

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