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Stack #4602770

TermDefinition
fossil organisms that were once living fossilized
trace fossil fossils LEFT by organisms
relative dating determining how old something is based on greater, same, or younger age
super position sediment deposited horizontally in the ground
cross cutting when rock cuts through another
atom this smallest unit of an element
isotope an element eith the same amount of protons but not neutrons
stable atom all trons are the same
unstable atom some/all trons are not the same
Created by: user-1973389
 

 



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