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Academic Raceway Fossils

Academic Raceway Fossils. Grade 6. Fossils. Remains or evidence of a once living thing. Examples of fossils. bones, shells, pollen grains, seeds, and imprints of an organism. What do fossils tell us?. Appearance and activities of extinct organisms

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Academic Raceway Fossils

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  1. Academic Raceway Fossils Grade 6

  2. Fossils • Remains or evidence of a once living thing

  3. Examples of fossils • bones, shells, pollen grains, seeds, and imprints of an organism

  4. What do fossils tell us? • Appearance and activities of extinct organisms • How living organisms have changed over time • Earth's climate has changed

  5. Earth's surface has changed • Many different life forms have existed at different times in Earth's history

  6. Trace fossils • Marks or evidence of animals tracks, trails, footprints, or burrows The petrified lump of dinosaur dung is a "trace" fossil

  7. How fossils formed: • Molds • Cast

  8. Mold • empty spaces left when an organism decays

  9. Cast • Created by molds filled in by minerals which harden

  10. Tar pits, freezing, and amber • Preserves entire organism fossils

  11. Imprints • Thin materials like leaves and feathers left in soft sediment which harden

  12. Freezing • Preserved the woolly mammoth and furry rhinoceros A 350,000-year-old skeleton of a woolly mammoth from Steinheim, Germany November 2, 2001 - BBC

  13. Tar pits • Preserved bison, camels,giant ground sloths, wolves, vultures & saber-toothed cats

  14. Petrification • occurs when water containing minerals evaporates and the minerals replace the decaying material

  15. An example of petrification • Petrified wood

  16. amber • Hardened tree sap • Preserves whole insects

  17. What type(s) of fossils have the same shape as the original organism • Imprints, Molds, and Casts

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