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Published byWalter Strickland Modified over 9 years ago
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What Era and Period did it come from?
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Describes timing and relationships between events that have occurred during the history of the Earth Divided into Eras: major changes in rock formations and fossils Eras are then divide in Periods Who makes these decisions?
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Paleo-ancient life Paleontology: study of ancient life Evolution of Organisms Past Environments Paleontologists find clues through Fossils
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Preserved remains or traces of animals, plants, and other organisms from the past.
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An organism must die & decay Dead organisms are buried by layers of sediment, which forms new rock All organic material is gone, a solid bone/trace is left
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Only hard parts of an organism can become fossilized. Soft body parts are usually lost, except for in special conditions.
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3 Main Types: 1. Preserved 2. Petrification 3. Traces
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Science of determining the relative order of past events, without necessarily determining their absolute age When groups of species existed compared to one another
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Index Fossil: used to identify geological time periods Characteristics: Common Easy-to-identify Wide distribution Ex. Trilobite, Flowering Plants
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Radioactive dating: comparison of radioactive isotopes found in a fossil to a known decay rate
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Congratulations!! You have been hand selected because of your expertise in fossils to help a team of scientists figure out some critical information about 4 fossils they recently discovered. Because they lack enough time to use radioactive dating or carbon dating techniques they need your help!!
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Outline: with the point of your pencil Shade: with the side of your pencil Take your time, be very detailed in your drawings
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