GC B12 Radioactive Decay 

In GC B3 and B4, we learned how scientists use relative dating to figure out the order in which various geologic events happened.  But scientists often talk—not just about relative age, but about the actual age of rocks and the fossils found in them.  How are these actual ages calculated?  Using a process called radiometric dating, which we will explore in the next few presentations.  The first thing we will need to understand is radioactive decay, which we will learn about in here.

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Non-narrated PowerPoint