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Published byLeslie Goodwin Modified over 9 years ago
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FossilsFossils
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Question of the Day Question: How much of a 100g uranium sample is left after 2 half lives? Answer: ……… Turn In: - p. 588 CYU 1 – 6 -Half Life Cubes Lab
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How to Fossilize Yourself:
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Types of fossils Body fossils: bones, teeth, shells, tree trunks etc Trace fossils: footprints, worm burrows, leaf prints etc
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Who Studies Fossils? Paleontologists: scientists that study fossils Paleo- = old Many work with microscopic fossils
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How Fossils Form Animal or plant dies IF Nothing eats the organism right away AND The organism/ footprint doesn’t get washed away AND the organism is buried in sediment (sand, mud etc) very soon after it dies (ex: sinking in mud) AND There is no oxygen in the surrounding environment AND The chemicals in the bones/ plant material are replaced by other minerals THEN the bones will become fossils
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Things to Remember about Fossils Form in sedimentary rock ONLY millions of years old not the actual bone they are a “model” of the original bone/footprint made of minerals very, very rare many conditions have to be perfect to form them (most organisms do not become fossils)
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Fossil Footprints Purpose: To make observations about a set of footprints and to determine four scenarios based upon those observations. Procedure: Utilizing the 4 scenarios of footprints, make at least 2 observations and 2 inferences for each scenario.
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Blood on the Tracks
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