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Fossil formed when a mold is filled in with sediment.
minerals replace all or part of an organism
Cast fossil
how oceans originally formed
Trilobites existed before jellyfish and ammonites.
Soft parts of plants are easily destroyed.
index
Thousands of species die out in a short time
footprint
Which of the following is an example of a trace fossil?
minerals replace all or part of an organism
Cast fossil
how oceans originally formed
Trilobites existed before jellyfish and ammonites.
Soft parts of plants are easily destroyed.
index
Thousands of species die out in a short time
footprint
A petrified fossil forms when
minerals replace all or part of an organism
Cast fossil
how oceans originally formed
Trilobites existed before jellyfish and ammonites.
Soft parts of plants are easily destroyed.
index
Thousands of species die out in a short time
footprint
Mass extinction means....
minerals replace all or part of an organism
Cast fossil
how oceans originally formed
Trilobites existed before jellyfish and ammonites.
Soft parts of plants are easily destroyed.
index
Thousands of species die out in a short time
footprint
Fossils are important when studying the history of Earth becuase fossils provide evidence of all of the following EXCEPT:
minerals replace all or part of an organism
Cast fossil
how oceans originally formed
Trilobites existed before jellyfish and ammonites.
Soft parts of plants are easily destroyed.
index
Thousands of species die out in a short time
footprint
Why are plant fossils not as common as animal fossils?
minerals replace all or part of an organism
Cast fossil
how oceans originally formed
Trilobites existed before jellyfish and ammonites.
Soft parts of plants are easily destroyed.
index
Thousands of species die out in a short time
footprint
In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?
minerals replace all or part of an organism
Cast fossil
how oceans originally formed
Trilobites existed before jellyfish and ammonites.
Soft parts of plants are easily destroyed.
index
Thousands of species die out in a short time
footprint
A(n) _________ fossil is a fossil that must be widely distributed and represent a type of organism that existed only briefly.
minerals replace all or part of an organism
Cast fossil
how oceans originally formed
Trilobites existed before jellyfish and ammonites.
Soft parts of plants are easily destroyed.
index
Thousands of species die out in a short time
footprint
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