-is the change in the characteristics of a species over several generations. The process in which species change over time, EVOLUTION, GENESIS, These are traces of organisms that lived in the past and were preserved by natural process or catastrophic events., DECAY, FOSSIL, A person who studies fossils., Paleontologist, Geneticist, It refers to shallow external molds left by animal or plant tissues with little or no organic materials present., IMPRINTS/IMPRESSION, COMPRESSION, It is the other side of this is the traces of organisms with more organic material., IMPRINTS/IMPRESSION, COMPRESSION, It is a fossilized imprint form in the substrate, Mold or Impression, Cast Fossil, It is produced when a mold fills with sediment and then hardens into rock, Mold or Impression, Cast Fossil, It is also known as ichnofossils, contain information about preserved footprints, trails, burrows, or any stamps that reveal about how things lived., True Form Fossil, Trace Fossil, These are large body parts of an organism that has been substituted by minerals., True Form Fossil, Trace Fossil, It is a method used to determine the age of the rocks by comparing them with the rocks in the other layer., Relative Dating, Radiometric Dating, It is a method used to determine the age of rocks using the decay of radioactive isotopes present in rocks., Relative Dating, Radiometric Dating, It is used to tell the age of organic materials., Relative Dating, Carbon Dating, It shows the major events in the Earth’s history. It also shows the appearance of various kinds of organisms in a particular period of time on earth., Geologic Time Scale, Global Positioning System, It is the largest division in the Geologic Time Scale, namely Precambriam as the oldest Era, ERA, PERIOD, It is the study of the similarities and differences in the structures of different species., Comparative Anatomy, DNA Anatomy, It may perform different functions in the species living in the different environment, or it may have the same origin but different functions., Homologous Structures, Analogous Structures, It refers to structures of different organisms that are similar in functions but different in origin., Homologous Structures, Analogous Structures, It is the splitting of an ancestral population into two or more sub-populations that are geographically isolated from one another., Convergent Evolution, Divergent Evolution, It is an increase in similarities among species derived from different ancestors as a result of similar adaptation to similar environment., Convergent Evolution, Divergent Evolution, It is the smallest unit & are usually measured in millions of years to tens of millions of years (geologic time scale)., ERA, Epochs.

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