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What characteristics do all index fossils share?
They add to our knowledge of the history of life on Earth
They can decompose or be eaten instead of leaving parts behind to be preserved in rock.
wide geographic range, existed briefly, been abundant, be easy to identify
Cenozoic
sedimentary rocks
Animals get dead and buried and become fossils.
Eon, era, period, epoch
Organisms found as fossils change over time, fossils can be used to date rock layers
What is the break down of spans of time in Earth history from largest to smallest?
They add to our knowledge of the history of life on Earth
They can decompose or be eaten instead of leaving parts behind to be preserved in rock.
wide geographic range, existed briefly, been abundant, be easy to identify
Cenozoic
sedimentary rocks
Animals get dead and buried and become fossils.
Eon, era, period, epoch
Organisms found as fossils change over time, fossils can be used to date rock layers
What does the law of fossil succession state?
They add to our knowledge of the history of life on Earth
They can decompose or be eaten instead of leaving parts behind to be preserved in rock.
wide geographic range, existed briefly, been abundant, be easy to identify
Cenozoic
sedimentary rocks
Animals get dead and buried and become fossils.
Eon, era, period, epoch
Organisms found as fossils change over time, fossils can be used to date rock layers
Why do scientists study fossils?
They add to our knowledge of the history of life on Earth
They can decompose or be eaten instead of leaving parts behind to be preserved in rock.
wide geographic range, existed briefly, been abundant, be easy to identify
Cenozoic
sedimentary rocks
Animals get dead and buried and become fossils.
Eon, era, period, epoch
Organisms found as fossils change over time, fossils can be used to date rock layers
In what era do we live?
They add to our knowledge of the history of life on Earth
They can decompose or be eaten instead of leaving parts behind to be preserved in rock.
wide geographic range, existed briefly, been abundant, be easy to identify
Cenozoic
sedimentary rocks
Animals get dead and buried and become fossils.
Eon, era, period, epoch
Organisms found as fossils change over time, fossils can be used to date rock layers
In what types of rock do fossils form?
They add to our knowledge of the history of life on Earth
They can decompose or be eaten instead of leaving parts behind to be preserved in rock.
wide geographic range, existed briefly, been abundant, be easy to identify
Cenozoic
sedimentary rocks
Animals get dead and buried and become fossils.
Eon, era, period, epoch
Organisms found as fossils change over time, fossils can be used to date rock layers
How do fossils form?
They add to our knowledge of the history of life on Earth
They can decompose or be eaten instead of leaving parts behind to be preserved in rock.
wide geographic range, existed briefly, been abundant, be easy to identify
Cenozoic
sedimentary rocks
Animals get dead and buried and become fossils.
Eon, era, period, epoch
Organisms found as fossils change over time, fossils can be used to date rock layers
Why do some organisms not leave behind fossil imprints?
They add to our knowledge of the history of life on Earth
They can decompose or be eaten instead of leaving parts behind to be preserved in rock.
wide geographic range, existed briefly, been abundant, be easy to identify
Cenozoic
sedimentary rocks
Animals get dead and buried and become fossils.
Eon, era, period, epoch
Organisms found as fossils change over time, fossils can be used to date rock layers
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