Bio Beyond Unit 4 Time Travelers Reading Guide Already Passed

Bio Beyond Unit 4 Time Travelers Reading Guide Already Passed what are fossils? remnants of organisms body fossil fossil that is a remains of a body direct evidence of life body fossil (evidence) trace fossil impression the organisms left in a rock (not the organism itself) indirect evidence trace fossil (evidence) fossil that shows that something was left behind during the organism's daily life indirect evidence, proof that organism existed something produced biologically by an organism trace fossil how old do an organism's remains have to be in order to be considered a fossil 10,000 years old fossils help understand evolution of life over time sequence of rock layers reveals story of earth, order in which story was written absolute dating process to determine the age of a rock, chemistry of igneous rock to find out when layer was formed absolute dating rock used igneous rock igneous rock rock formed from hardened molten materials relative dating uses what we know about other layers to estimate the age of a rock layer