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How is the fossil record important?
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
It provides evolutionary links between species.
They became extinct.
The fossil was formed around the same time as the rock layer that contains it.
Lived during many geologic time periods.
They contain evidence showing changes in the atmospheric conditions
Dramatic change in life forms.
Rock layer C is older than A and B.
If rock layer A is on top of rock layer B and rock layer B is on top of rock layer C, which of the following is true according to the law of superposition?
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
It provides evolutionary links between species.
They became extinct.
The fossil was formed around the same time as the rock layer that contains it.
Lived during many geologic time periods.
They contain evidence showing changes in the atmospheric conditions
Dramatic change in life forms.
Rock layer C is older than A and B.
What determines the divisions in the geologic time scale?
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
It provides evolutionary links between species.
They became extinct.
The fossil was formed around the same time as the rock layer that contains it.
Lived during many geologic time periods.
They contain evidence showing changes in the atmospheric conditions
Dramatic change in life forms.
Rock layer C is older than A and B.
What kinds of things do scientists date using Radiometric dating with Carbon-14? Why?
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
It provides evolutionary links between species.
They became extinct.
The fossil was formed around the same time as the rock layer that contains it.
Lived during many geologic time periods.
They contain evidence showing changes in the atmospheric conditions
Dramatic change in life forms.
Rock layer C is older than A and B.
Why are ice cores important to the study of geologic history?
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
It provides evolutionary links between species.
They became extinct.
The fossil was formed around the same time as the rock layer that contains it.
Lived during many geologic time periods.
They contain evidence showing changes in the atmospheric conditions
Dramatic change in life forms.
Rock layer C is older than A and B.
Which generalization can be made about the relative age of a fossil found in a sedimentary rock bed?
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
It provides evolutionary links between species.
They became extinct.
The fossil was formed around the same time as the rock layer that contains it.
Lived during many geologic time periods.
They contain evidence showing changes in the atmospheric conditions
Dramatic change in life forms.
Rock layer C is older than A and B.
Which is not a characteristic of an index fossil?
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
It provides evolutionary links between species.
They became extinct.
The fossil was formed around the same time as the rock layer that contains it.
Lived during many geologic time periods.
They contain evidence showing changes in the atmospheric conditions
Dramatic change in life forms.
Rock layer C is older than A and B.
Index fossils help scientists estimate the age of a rock because index fossil species only existed for a relatively short time. What happened to the species that are now used as index fossils?
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
It provides evolutionary links between species.
They became extinct.
The fossil was formed around the same time as the rock layer that contains it.
Lived during many geologic time periods.
They contain evidence showing changes in the atmospheric conditions
Dramatic change in life forms.
Rock layer C is older than A and B.
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