C. Explain how scientists radioactively (absolute) date rocks and organic materials.
D. In order to find the absolute age of organic material scientists use radioactive decay of isotopes. Which radioactively decaying element do they use to find the absolute age of organic material?
E. Explain how scientists radioactively date rock layers. According to the Law of Superposition, explain how to date an extrusion rock layer and an intrusive rock layer.
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