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Understanding Geological Time Directions: Answer the following questions as you navigate through Understanding Geologic Time. http://www.ucmp.berkeley.edu/education/explorations/tours/geotime/index.html 1. How is relative age different from the actual date of an event? Why is the “absolute date” of an artifact not the “actual” date? 2. Explain the Law of Superposition. 3. What can radiometric dating tell us about the age of rocks that the Law of Superposition cannot? 4. How can you find the age of a layer of rock that is surrounded by layers of volcanic ash? 5. What do the periods in the geologic time scale represent? 6. What are the major divisions of the Geologic Time Scale? 7. Within the Phanerozoic, we see three major changes in biodiversity, call Eras. Briefly explain characteristics of each phase. 8. What do the terms Paleozoic, Mesozoic and Cenozoic mean?
