Transcript STARTER

Fossils
A fossil is the preserved remains or
traces of living things
They must be natural and ancient
(10,000 years or older) and buried in
rocks
Mineral Replacement/Petrified
Fossils where the spaces inside are filled
with minerals from groundwater (turned to
stone)
Examples: bones or wood
Carbon Films
A thin film of carbon residue left behind
when pressure forces gases and liquids
from an organism (photocopy of a
organism)
Examples:
Graptolites
coal
Molds
A cavity or hollow space left in a rock when
the hard parts of an organism have
decayed or dissolved in water or air.
Examples:
Seashells
Muffin pan
Casts
A copy of an original object formed when
minerals fill a mold and make a new rock
Examples:
Seashell
Muffins
Original or Preserved Remains
Fossils where the original soft parts (skin,
hair) of an organism have been preserved
by either ice, amber or tar
Examples:
Insects
Wooly mammoth
Tar pits
Tar Pits
Animals were believed to have been stuck in
tar areas. The tar then seeped into their
bones and over time formed a fossil.
Trace Fossils
Fossils that show the activities of an
organism (trails and burrows, tracks, poop)
Examples:
Worm burrows
Sauropod tracks
Fossils- Ticket to Leave
1. Name the 6 types of fossils.
2. Cavity or hollow area
3. Activities of organism (tracks, trails,
poop)
4. What type of fossil is shown in the
picture?
5. A fossil that is in the shape of the
organism.
6. Wood that is “turned to stone” or
replaced by minerals
7. “Photocopy of an organism” or thin copy
caused by pressure
8. What information can a fossil tell about
the past? List two examples.