Fossil Notes

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• Fossil Notes

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• Part One What is a Fossil?

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• A fossil is the preserved remains or traces of an
  organism that lived in the past.

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• Paleontologists are scientists who study fossils
  looking when, where, and how organisms lived.

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• Fossils give clues to diversity of life over
  Earths history, to past climate and surface
  changes on Earth, and to changes that have
  occurred within species of organisms.

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• Conditions needed for fossil formation
• quickly buried by sediment, soft mud
• Hard body parts-shell, skeleton, etc.

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• Part Two Types of Fossilization?

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• Mold fossil sediments bury an organism and the
  organism decays leaving a cavity/hole in the
  shape of the organism.

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• Cast fossil forms when a mold fossil is filled
  with sand or mud that hardens into the shape of
  the organism. It creates a 3D image of what the
  organism looked like.

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• Petrified fossil turning to stone this
  fossil forms when minerals soak into the buried
  remains and change them into rock. Ex
  Petrified Wood

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• Preserved fossil when an entire organism or
  parts of organisms are trapped in ice, tar, or
  amber and are prevented from decaying.

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• Carbonized fossil carbon film fossil -forms
  when organisms or parts, like leaves, stems,
  flowers, fish, are pressed between layers of soft
  mud or clay that hardens squeezing out the
  decaying organism and leaving the carbon imprint
  in the rock.

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• Trace fossil forms when the mud or sand hardens
  to stone where a footprint, trail, or burrow of
  an organism was left behind.

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Part Three What is an index fossil?
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• Index Fossil widely distributed fossils and
  represents a type of organism that only lived for
  a brief amount of time.

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• Index fossils are useful because they can help
  determine how old rocks are.

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Fossil Video You must write down 10 facts!!!