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Unit 5

What are fossils? Marks or remains of plants and animals that lived long ago
Scientists who study fossils Paleontologists
What do fossils show? 1) How the earth changed over time 2) Some animals/plants have changed a lot while others haven't changed at all
tree sap that animals are trapped in and preserved amber
when minerals replace parts of a tree petrified wood
fossils that show animals were there but none of its parts are preserved trace fossil
carbon from plants are pressed into rock carbon file
an impression of an organism formed when sediment hardens around it mold
a model of an organism formed when sediment fills a mold and hardens cast
the age of a layer of rock compared to other layers of rock relative age
fossils of animals that only lived a short period of time that help tell the approximate age of a rock index fossil
when the earth was connected as a super continent pangea
a major event that causes a large population of species to become extinct mass extinction
Age of mammals present time Cenozoic Era
Age of Dinosaurs continents begin to break apart Mesozoic Era
Age of Trilobites Aquatic animals all of Earth joined together Paleozoic Era
first life on Earth bacteria and algae Precambrian
Created by: Wildcatscience