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Earth Sciences 20 Online
OpenStudy (anonymous):

Which example describes a method of relative dating? A. using radioactive isotopes to calculate the age of a rock B. measuring the depth of tree bark C. using fossils to determine the oldest rock layer in a canyon D. examining historical records to determine when a volcano erupted @youngstudier

OpenStudy (youngstudier):

What do you think?

OpenStudy (youngstudier):

@ShootingStarz ?

OpenStudy (anonymous):

oH i already answered that but ty :)

OpenStudy (anonymous):

its C xdd

OpenStudy (youngstudier):

:P Sorry. My mom is having us clean the house :PPP

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