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What is an index fossil?
Animals get dead and buried and become fossils.
Cenozoic
A fossil that can be used to help date sedimentary rock layers.
4.6 billion years
Eon, era, period, epoch
They add to our knowledge of the history of life on Earth
Organisms found as fossils change over time, fossils can be used to date rock layers
sedimentary rocks
What is the break down of spans of time in Earth history from largest to smallest?
Animals get dead and buried and become fossils.
Cenozoic
A fossil that can be used to help date sedimentary rock layers.
4.6 billion years
Eon, era, period, epoch
They add to our knowledge of the history of life on Earth
Organisms found as fossils change over time, fossils can be used to date rock layers
sedimentary rocks
What does the law of fossil succession state?
Animals get dead and buried and become fossils.
Cenozoic
A fossil that can be used to help date sedimentary rock layers.
4.6 billion years
Eon, era, period, epoch
They add to our knowledge of the history of life on Earth
Organisms found as fossils change over time, fossils can be used to date rock layers
sedimentary rocks
In what era do we live?
Animals get dead and buried and become fossils.
Cenozoic
A fossil that can be used to help date sedimentary rock layers.
4.6 billion years
Eon, era, period, epoch
They add to our knowledge of the history of life on Earth
Organisms found as fossils change over time, fossils can be used to date rock layers
sedimentary rocks
Approximately how old is Earth?
Animals get dead and buried and become fossils.
Cenozoic
A fossil that can be used to help date sedimentary rock layers.
4.6 billion years
Eon, era, period, epoch
They add to our knowledge of the history of life on Earth
Organisms found as fossils change over time, fossils can be used to date rock layers
sedimentary rocks
Why do scientists study fossils?
Animals get dead and buried and become fossils.
Cenozoic
A fossil that can be used to help date sedimentary rock layers.
4.6 billion years
Eon, era, period, epoch
They add to our knowledge of the history of life on Earth
Organisms found as fossils change over time, fossils can be used to date rock layers
sedimentary rocks
In what types of rock do fossils form?
Animals get dead and buried and become fossils.
Cenozoic
A fossil that can be used to help date sedimentary rock layers.
4.6 billion years
Eon, era, period, epoch
They add to our knowledge of the history of life on Earth
Organisms found as fossils change over time, fossils can be used to date rock layers
sedimentary rocks
How do fossils form?
Animals get dead and buried and become fossils.
Cenozoic
A fossil that can be used to help date sedimentary rock layers.
4.6 billion years
Eon, era, period, epoch
They add to our knowledge of the history of life on Earth
Organisms found as fossils change over time, fossils can be used to date rock layers
sedimentary rocks
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