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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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fossils
Fossils
  • Remains or evidence of a once living thing
examples of fossils
Examples of fossils
  • bones, shells, pollen grains, seeds, and imprints of an organism
what do fossils tell us
What do fossils tell us?
  • Appearance and activities of extinct organisms
  • How living organisms have changed over time
  • Earth's climate has changed
slide5
Earth's surface has changed
  • Many different life forms have existed at different times in Earth's history
trace fossils
Trace fossils
  • Marks or evidence of animals tracks, trails, footprints, or burrows

The petrified lump of dinosaur dung is a "trace" fossil

slide8
Mold
  • empty spaces left when an organism decays
slide9
Cast
  • Created by molds filled in by minerals which harden
tar pits freezing and amber
Tar pits, freezing, and amber
  • Preserves entire organism fossils
imprints
Imprints
  • Thin materials like leaves and feathers left in soft sediment which harden
freezing
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

tar pits
Tar pits
  • Preserved bison, camels,giant ground sloths, wolves, vultures & saber-toothed cats
petrification
Petrification
  • occurs when water containing minerals evaporates and the minerals replace the decaying material
amber
amber
  • Hardened tree sap
  • Preserves whole insects