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Which theory does evidence found in sedimentary rocks best support?
Dramatic change in life forms.
They became extinct.
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
Radioactive dating
The area that is now mountains was once under the oceans.
They contain evidence showing changes in the atmospheric conditions
Organisms have evolved from simple to complex life forms.
Lived during many geologic time periods.
Which is not a characteristic of an index fossil?
Dramatic change in life forms.
They became extinct.
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
Radioactive dating
The area that is now mountains was once under the oceans.
They contain evidence showing changes in the atmospheric conditions
Organisms have evolved from simple to complex life forms.
Lived during many geologic time periods.
What determines the divisions in the geologic time scale?
Dramatic change in life forms.
They became extinct.
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
Radioactive dating
The area that is now mountains was once under the oceans.
They contain evidence showing changes in the atmospheric conditions
Organisms have evolved from simple to complex life forms.
Lived during many geologic time periods.
Why are ice cores important to the study of geologic history?
Dramatic change in life forms.
They became extinct.
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
Radioactive dating
The area that is now mountains was once under the oceans.
They contain evidence showing changes in the atmospheric conditions
Organisms have evolved from simple to complex life forms.
Lived during many geologic time periods.
Fossils of ocean clams are found in the rocks of the Appalachian Mountains. What do these fossils most likely indicate?
Dramatic change in life forms.
They became extinct.
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
Radioactive dating
The area that is now mountains was once under the oceans.
They contain evidence showing changes in the atmospheric conditions
Organisms have evolved from simple to complex life forms.
Lived during many geologic time periods.
What kinds of things do scientists date using Radiometric dating with Carbon-14? Why?
Dramatic change in life forms.
They became extinct.
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
Radioactive dating
The area that is now mountains was once under the oceans.
They contain evidence showing changes in the atmospheric conditions
Organisms have evolved from simple to complex life forms.
Lived during many geologic time periods.
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?
Dramatic change in life forms.
They became extinct.
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
Radioactive dating
The area that is now mountains was once under the oceans.
They contain evidence showing changes in the atmospheric conditions
Organisms have evolved from simple to complex life forms.
Lived during many geologic time periods.
Which method is used to determine absolute age of a rock or fossil?
Dramatic change in life forms.
They became extinct.
Only fossils because rocks were never living, so they don't lose Carbon 14 over time.
Radioactive dating
The area that is now mountains was once under the oceans.
They contain evidence showing changes in the atmospheric conditions
Organisms have evolved from simple to complex life forms.
Lived during many geologic time periods.
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